Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Term 1 > Biology II > Flashcards

Biology II Flashcards

1
Q

What are the accessory structures of the eye

A

eyebrows, eyelashes, eyelids, extrinsic muscles that move the eyeballs, and lacrimal (tear‐producing) apparatus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are special senses

A

smell, taste, vision, hearing, and equilibrium (balance).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are general senses

A

General senses, which include somatic senses and visceral senses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are 4 major types of somatic senses

A

-Tactile sensations (touch, pressure, vibration, itch, and tickle)
-Thermal sensation (heat and cold)
-Pain sensations
-Proprioceptive (your body’s awareness of space) sensations (joint and muscle position sense and movements of the limbs)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Where are somatic receptors located

A

skin, mucous membranes, muscles, tendons, and joints.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the receptors of touch

A

-Meissner corpuscles, hair root plexuses, Merkel discs, and Ruffini corpuscles.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the receptors of pressure and vibration

A

Pacinian corpuscles.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What causes tickle and itch sensations

A

stimulation of free nerve endings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

___________________, free nerve endings in the epidermis and dermis, adapt to continuous stimulation.

A

Thermoreceptors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

_________________are free nerve endings that are located in nearly every body tissue; they provide pain sensations. (referred pain)

A

Nociceptors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

__________________________inform us of the degree to which muscles are contracted, the amount of tension present in tendons, the positions of joints, and the orientation of the head.

A

Proprioceptors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is adaption

A

Adaption is a decrease in sensation during a prolonged stimulus. Some receptors are rapidly adapting; others are slowly adapting.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Define receptors

A

Receptors can be classified structurally by their microscopic features as free nerve endings, encapsulated nerve endings, or separate cells.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q
  • A region of the brain must _____________ and ______________ the nerve impulses into a sensation.
A

receive and integrate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the process of sniffing

A
  1. Sniff those particals into your nose
  2. Most get filtered, but some get to your olfactory epithelium
    a. Those dissolve in the mucus that coats it
  3. Binds to receptors on olfactory neurons
  4. Fire action potential up axons
  5. Sent to olfactory portion of the brain
  6. Goes to (1) the frontal to differentiate and (2) to the limbic for memory or danger.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The olfactory epithelium in the upper portion of the nasal cavity contains:

A

olfactory receptors, supporting cells , and Basal cells.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are the receptor cells of taste?

A

gustatory receptor cells, are located in taste buds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what are the 5 primary tastes

A

salty, sweet, sour, bitter, and umami

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What’s the process of how we taste things

A

Food diffuses through taste pours and bind on receptors, the trigger and action potential, transmitted to taste centers of cerebral cortex, we release digestive enzymes to begin digestion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What are the three layers of the eyeball

A

(a) fibrous tunic (sclera and cornea), (b) vascular tunic (choroid, ciliary body, and iris), and (c) retina.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What does the retina consist of ?

A

a neural layer (photoreceptor layer, bipolar cell layer, and ganglion cell layer) and a pigmented layer (a sheet of melanin-containing epithelial cells).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Whats the difference between rods and cones

A

Rods do well helping us see in dark, cones do well in light and we can see color and stuff

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What are the three types of improper refraction

A

Improper refraction may result from myopia (nearsightedness), Hyperopia (farsightedness), or astigmatism (irregular curvature of the cornea or lens).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is the first step of seeing

A

the absorption of light rays by photopigments in rods and cones (photoreceptors).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What is the second step of seeing

A

Stimulation of the rods and cones then activates bipolar cells, which in turn activate the ganglion cells.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What does the external ear consists of?

A

auricle, external auditory canal, and eardrum.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What does the middle ear consist of?

A

The middle ear consists of the auditory (eustachian) tube, auditory ossicles, and oval window.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What does the internal ear consist of

A

The internal ear consists of the bony labyrinth and membranous labyrinth. The internal ear contains the spiral organ (organ of Corti), the organ of hearing.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q
A

-Hair cells release neurotransmitter molecules that can initiate nerve impulses in sensory neurons.
-Sensory neurons in the cochlear branch of the vestibulocochlear (VIII) nerve terminate in the medulla oblongata. Auditory signals then pass to the midbrain, thalamus, and temporal lobes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

What is static equilibrium?

A

the orientation of the body relative to the pull of gravity. The maculae of the utricle and saccule are the sense organs of static equilibrium.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

What is dynamic equilibrium

A

maintenance of body position in response to rotational acceleration and deceleration.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

What is motion sickness

A

The confusion of your brain, you see that you’re moving but you are standing still

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

What are the functions of the endocrine system

A
  1. Help regulate:
    i. Chemical composition and volume of internal environment (interstitial fluid). PANCREAS
    ii. Metabolism and energy balance. THYROID
    iii. Contraction of smooth and cardiac muscle fibers. THYROID
    iv. Glandular secretions. MOST GLANDS
    v. Some immune system activities. THYMUS
  2. Control growth and development. PITUITARY
  3. Regulate operation of reproductive systems. TESTES AND OVARIES
  4. Help establish circadian (daily) rhythms. THYROID
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

What are the two main sections of the peripheral nervous system

A

Somatic and autonomic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

What are the two motor neurons in the autonomic NS

A

-preganglionic neurons which are in brain and spinal cord
-Postganglionic neuron extends to the organ

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

What are the two arms of the autonomic NS

A

sympathetic and parasympathetic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

What is the sympathetic nervous system

A

-fight or flight
-takes over and increases activities
-think of the E divison
-Exercise, excitment, emergency, embarassment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

What is the parasympathetic NS

A

-rest and digest
-conserve energy
-D division
-Digestion, defecation, dieresis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

How do the parasympathetic and sympathetic NS impact the digestive system

A

Parasympathetic- increase activity
sympathetic- decrease activity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

define sensation

A

The conscious or subconscious awareness of external and internal stimuli

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

what are the four sensory conditions

A

-A stimulus or change in the environment, capable of activating certain sensory neurons
-A sensory receptor must convert the stimulus to an electrical signal, which produces one or more nerve impulses if it is large enough.
-The nerve impulses must be conducted along a neural pathway from the sensory receptor to the brain.
-A region of the brain must receive and integrate the nerve impulses into a sensation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

Rods help us see in the _________ and cones help us perceive __________ in the ________

A

dark;colour;light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

What are the steps we see by

A
  1. absorption of light by rods and cones, which contain photopigments
  2. activate bipolar and ganglionic cells
  3. Image formation on retina involves refraction of light rays by cornea and lens which focus on inverted image on central focus of retina
  4. For viewing close objects lens increases curvature and pupil constricts to prevent light from entering eye through periphery
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

myopia

A

nearsightedness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

hyperopia

A

farsightedness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

astigmatism

A

irregular curvature of cone/lens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

What is the process by which we hear

A

1.Sound waves enter external medullary cavity
2.They strike the eardrum
3.Malleus starts to vibrate, going to the incus and the stapes
4.Stapes moves back and forth, pushing the oval window in and out
5.Oval window movement makes fluid pressure waves
6.Fluid pressure waves are transmitted causing it to bulge outward into the middle ear
7.Pressure waves continue in the cochlear duct
8.Pressure waves cause basilar membrane to vibrate
a. Which moves the hair cells. Bending of the hair cells stimulates hair cells to release NT molecule for nerve impulse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

What is referred pain?

A

When pain you feel in your body is indicating a problem elsewhere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

Mechanoreceptors

A

Somatosensory receptors which relay extracellular stimulus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

osmoreceptors

A

sense osmotic pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

Chemoreceptors

A

change in chemical comp of blod

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

What are the 10 basic endocrine glands

A

-hypothalamus
-adrenal
-thymus
-pituitary
-thyroid
-ovaries
-parathyroid
-testes
-pineal gland
pancreas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

What’s the difference between Lipid and Water soluable hormones

A

Lipids: affect cell function
Water: Alter cell fxn by activating plasma receptors with elicit production using 2nd messenger system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

Insulin

A

-pancreas
-controls the bodies use of sugar. too much is hypoglycemia, too little is diabetes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

Glucagon (Alpha)

A

-pancreas
-keeps blood sugar levels balanced with insulin
-triggered by drop in blood glucose

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
56
Q

Epi and norepi

A

-released by adrenal gland, increase heart rate, and BP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
57
Q

Thyroid hormones

A

thyroxine (t4)
Triiodothychone (T3)
Parafollicular
Calcatonin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
58
Q

What is the thyroid mainly responsible for

A

-regulate oxygen use
-metabolism
-growth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
59
Q

Growth hormone

A

-anterior pit
-stimulates growth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
60
Q

ADH

A

-anterior pit
-liquid retention

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
61
Q

Acetyl choline

A

Movement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
62
Q

Fat soluable?

A
  1. Steroid hormones diffuse through the plasma membrane of target cells
  2. Once inside the cell, the hormone enters the nucleus
  3. Then, the hormone binds to a specific protein within the nucleus
  4. Hormone-receptor complex binds to specific sites on the cell’s DNA
  5. Certain genes are activated to transcribe messenger RNA
  6. New proteins are synthesized
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
63
Q

What are the three functions of blood

A

-Transportation
-regulation
-protection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
64
Q

How does blood help transportation

A

-Blood transports oxygen from the lungs to cells throughout the body and carbon dioxide from the cells to the lungs
-carries nutrients from the gastrointestinal tract to body cells
-heat and waste products away from cells
-hormones from endocrine glands to other body cells.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
65
Q

How does blood help with regulation

A

-Blood helps regulate the pH of body fluids.
-The heat-absorbing and coolant properties of the water in blood plasma and its variable rate of flow through the skin help adjust body temperature.-
- Blood osmotic pressure also influences the water content of cells.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
66
Q

How does blood help protect us?

A

-forming scabs, and blood clots
-white blood cells (phagocytes)
-producing proteins called antibodies.
-Blood contains additional proteins, called interferons and complement, that also help protect against disease.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
67
Q

What are the three main physical characteristics of blood?

A

-(thickness) greater than that of water
-temperature of 38˚ (100.4˚F)
- pH range between 7.35 and 7.45

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
68
Q

Blood is a _____________________ that consists of cells surrounded by extracellular matrix.

A

liquid connective tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
69
Q

What is the unformed element in blood

A

plasma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
70
Q

What are the formed elements in blood

A

-Red blood cells (eurythrocytes)
-white blood cells (leukocytes)
-platelets

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
71
Q

What are the types of white blood cells

A

Agranular and granular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
72
Q

What are the types of agranular leukocytes

A

-T and B lymphocytes and natural killer cells
-Monocytes (

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
73
Q

What are the types of granular leukocytes

A
  1. Neutrophils
  2. Eosinophils
  3. Basophils
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
74
Q

Do erythrocytes contain nuclei

A

no

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
75
Q

What is the average life-span of an erythrocyte?

A

120 days

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
76
Q

How many erythrocytes are in healthy men and women

A

men- 5.4 million/mL
women- 4.8 million/mL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
77
Q

RBC formation, called __________, occurs in adult red bone marrow.

A

erythropoiesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
78
Q

Are Leukocytes nucleated

A

yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
79
Q

What is the purpose of leukocytes

A

to combat inflammation and infection. Neutrophils and macrophages (which develop from monocytes) do so through phagocytosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
80
Q

What is the average life-span of leukocytes

A

a few hours to a few days

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
81
Q

how many white blood cells to we have on average

A

5,000-10,000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
82
Q

What are platelets

A

disc-shaped cell fragments without nuclei that are formed from megakaryocytes and take part in hemostasis by forming a platelet plug.

83
Q

How many platelets are in healthy blood

A

150,000-400,000

84
Q

What is the normal lifespan of a platelet

A

5-9 days

85
Q

-Red blood cells will be broken down my macrophages in 3 spots

A

-Spleen
-Liver
-Red bone marrow

86
Q

WHAT IS HEMOSTASIS

A

-Hemostasis
-the stoppage of bleeding, involves vascular sp, platelet plug formation, and blood clotting.
-In vascular spasm, the smooth muscle of a blood vessel wall contracts.
-Platelet plug formation is the aggregation of platelets to stop bleeding.
-A clot is a network of insoluble protein fibers (fibrin) in which formed elements of blood are trapped. The chemicals involved in clotting are known as clotting factors.

87
Q

O blood can receive

A

O blood

88
Q

A blood can recieve

A

A blood and O blood

89
Q

B blood can recieve

A

O blood and B blood

90
Q

AB blood can receive

A

all blood

91
Q

Cardiac muscles are…

A

-striated
-involuntary
-grouped in bundles of fibers

92
Q

what is the membrane that encloses the heart

A

Pericardium

93
Q

What are the three layers of the heart

A

epicardium, myocardium, and endocardium.

94
Q

The blood flows through the heart from the superior and inferior ___________ and the __________ to the right atrium, through the right ventricle, and through the ___________ to the lungs.

A

venae cavae
coronary sinus
pulmonary trunk

95
Q

From the lungs, blood flows through the pulmonary veins into the _________________, through the left ventricle, and out through the _____.

A

left atrium
aorta.

96
Q

What is the purpose of valves in the heart

A

prevent the backflow of blood in the heart.

97
Q

What are the atrioventricular valves

A

-tricuspid valve on the right side of the heart
- the bicuspid (mitral) valve on the left.

98
Q

How do atrioventricular valves work?

A

chordae tendineae, and their papillary muscles stop blood from flowing back into the atria. Each of the two arteries that leave the heart has a semilunar valve.

99
Q

Which valve is for the left atrium

A

Bicuspid (mitral)

100
Q

what is pulse

A

the rhythmic expansion and elastic recoil of a system artery after each contraction of the left ventricle.

101
Q

Myocardial infarction

A

HEART ATTACK, gross necrosis of myocardial tissue due to interrupted blood supply death of muscular tissue in the heart due to lack of oxygen

102
Q

Ischemia:

A

Ischemia: a lack of sufficient blood to a body part due to obstruction of constriction of a blood vessel

103
Q

Angina Pectoris

A

Angina Pectoris: a pain in the chest related to reduced coronary circulation due to coronary artery disease or spasms of vascular smooth muscle in coronary arteries

104
Q

the heart muscle does not receive an adequate amount of blood because of an interruption in the blood supply. This can be caused by atherosclerosis or coronary artery spasm.

A

coronary artery disease (CAD)

105
Q

Atherosclerosis

A

Atherosclerosis is a process in which fatty substances are deposited in the walls of the medium-sized and large arteries resulting in an impeded blood flow.

106
Q

What are some congenital defects

A

patent ductus arteriosus,
atrial septal defects (ASD),
ventricular septal defect (VSD),
Tetralogy of Fallot.

107
Q

Why does exercise help heart health

A

■ Sustained exercise increases oxygen demand on muscles.
■ Among the benefits of aerobic exercise are increased maximal cardiac output, decreased blood pressure, weight control, and increased ability to dissolve clots.

108
Q

What is the max your heart rate should be

A

heart rate should never exceed 120 minus your age

109
Q

What is an ECG

A

electrocardiogram

110
Q

What is the P wave

A

depolarization of the atria

111
Q

What is the QRS complex

A

onset of ventricular depolarization

112
Q

What is the T wave

A

ventricular repolarization

113
Q

What is the system of conduction in the heart

A
  1. Sinoatrial node- conducts action potential through atria which finish contracting at the same time
  2. Atrioventricular node-action potential slows considerably, providing time for the atria to empty their blood into the ventricles.
  3. Atrioventricular bundle (bundle of His)- action potential conducts from atria to ventrical
  4. Right and left bundle branches- action potential course through the interventricular septum toward the apex of the heart.
  5. Purkinje fibers
    rapidly conduct the action potential, first to the apex of the ventricles and then upward to the remainder of the ventricular myocardium. Then, a fraction of a second after the atria contract, the ventricles contract.
114
Q

Where is the SA node found

A

just above the opening of the superior vena cava

115
Q

Where is the AV node found

A

the interatrial septum, just anterior to the opening of the coronary sinus

116
Q

What is Cardiac output

A

the amount of blood ejected by the left ventricle into the aorta each minute:
CO = stroke volume x beats per minute.

117
Q

What is stroke volume

A

the amount of blood ejected by a ventricle during ventricular systole. It is related to stretch on the heart before it contracts, forcefulness of contraction, and the amount of pressure required to eject blood from the ventricles.

118
Q

Heart rate is affected by…

A

-hormones (epinephrine, norepinephrine, thyroid hormones),
-ions (Na+, K+, Ca2+),
-age
-gender
-physical fitness
-body temperature.

119
Q

Pressure is related to ________________ of chamber

A

size and volume

120
Q

Blood flow is controlled by opening and closing of ________________ and contraction/ relaxation of _____________________

A

valves; myocardium

121
Q

what does coronary cardiac circulation do

A

delivers Oxygenated blood to myocardium and removes CO2 from it

122
Q

Doxygenatied blood from coronary cardiac circulation returns to __________________ via coronary sinus

A

right atrium

123
Q

What are the steps of blood flow

A
  • Superior/inferior vena cava, coronary sinus
  • right atrium
    -tricuspid
    -right ventricle
    -pulmonary valve
    -pulmonary trunk and arteries
    -lungs
    -pulmonary veinss
    -left atrium
    -bicuspid
    -left ventricle
    -aortic valve
    -arota
    -arteries
    -arterioles
    capillaries
    -venules
    -veins
124
Q

What are the functions of blood vessels

A
  1. carries blood away from the heart (in arteries), transports it through the tissues of the body (in arterioles, capillaries, and venules), and then returns it to the heart (in veins).
  2. Exchange of substances between the blood and body tissue cells occurs as blood flows through the capillaries.
  3. Nutrients and oxygen diffuse from the blood through interstitial fluid into tissue cells. Waste products, including carbon dioxide, diffuse from tissue cells through interstitial fluid into the blood.
125
Q

What do arteries do?

A

carry blood away from the heart. Their walls consist of three layers. The structure of the middle layer gives arteries their two major properties, elasticity and contractility.

126
Q

What are arterioles and what do they do?

A

small arteries that deliver blood to capillaries. Through constriction and dilation, arterioles play a key role in regulating blood flow from arteries into capillaries.

127
Q

What are capillaries and what do they do?

A

microscopic blood vessels through which materials are exchanged between blood and interstitial fluid. Precapillary sphincters regulate blood flow through capillaries.

128
Q

Capillary blood pressure

A

“pushes” fluid out of capillaries into interstitial fluid (filtration). Blood colloid osmotic pressure “pulls” fluid into capillaries from interstitial fluid (reabsorption).

129
Q

Autoregulation

A

local adjustments of blood flow in response to physical and chemical changes in a tissue.

130
Q

Autoregulation

A

local adjustments of blood flow in response to physical and chemical changes in a tissue.

131
Q

What are venules and what do they do?

A

small vessels that emerge from capillaries and merge to form veins. They drain blood from capillaries into veins.

132
Q

Veins

A

consist of the same three layers as arteries but have less elastic tissue and smooth muscle. They contain valves that prevent backflow of blood. Weak venous valves can lead to varicose veins.

133
Q

What is a venous pump

A

, the volume of blood flowing back to the heart through systemic veins, occurs due to the pumping action of the heart, aided by skeletal muscle contractions (the skeletal muscle pump), and breathing (the respiratory pump).

134
Q

What are the steps of skeletal pump

A

-At rest the valves are open and blood flows upward towards the heart.
-Contraction of leg muscles pushes blood closer to the heart. The lower valve closes.
-Just after muscle relaxation, the valve closer to the heart closes and the lower valve opens.

135
Q

Blood flow is determined by

A

pressure and vascular resistance

136
Q

Blood pressure is highest in the ________ and large systemic arteries; it drops progressively as distance from the _____________ increases. Blood pressure in the right atrium is close to 0 mm Hg.

A

Aorta; left ventricle

137
Q

An increase in blood volume ____________ blood pressure, and a decrease in blood volume ___________ it.

A

Increase; decrease

138
Q

What is vascular resistance? What does it depend on?

A

the opposition to blood flow mainly as a result of friction between blood and the walls of blood vessels. It depends on the size of the blood vessel lumen, blood viscosity, and total blood vessel length.

139
Q

Blood pressure and blood flow are regulated by

A

neural and hormonal negative feedback systems and by autoregulation.

140
Q

Where is the CV center and what does it do?

A

in the medulla oblongata helps regulate heart rate, stroke volume, and size of blood vessel lumen.

141
Q

Vasomotor nerves (sympathetic) control

A

vasoconstriction and vasodilation.

142
Q

Baroreceptors (pressure-sensitive receptors)

A

send impulses to the cardiovascular center to regulate blood pressure.

143
Q

Chemoreceptors

A

(receptors sensitive to concentrations of oxygen, carbon dioxide, and hydrogen ions) also send impulses to the cardiovascular center to regulate blood pressure.

144
Q

What are the two major circulatory routes

A

systematic and pulmonary circulation

145
Q

What does systematic circulation do

A

takes oxygenated blood from the left ventricle through the aorta to all parts of the body and returns deoxygenated blood to the right atrium.

146
Q

What is vascular resistance? What does it depend on

A

the opposition to blood flow mainly as a result of friction between blood and the walls of blood vessels. It depends on the size of the blood vessel lumen, blood viscosity, and total blood vessel length.

147
Q

Deoxygenated blood is returned to the heart through the ________________. All veins of the systemic circulation flow into either the superior or inferior ___________or the _____________________, which empty into the ________________

A

systematic veins; vena cava; coronary sinus; right atrium

147
Q

What does pulmanory circulation do

A

takes deoxygenated blood from the right ventricle to the air sacs of the lungs and returns oxygenated blood from the air sacs to the left atrium. It allows blood to be oxygenated for systemic circulation.

148
Q

How does fetal circulation work

A

-It involves the exchange of materials between fetus and mother via the placenta
- The fetus derives O2 and nutrients from and eliminates CO2 and wastes into maternal blood. At birth, when pulmonary (lung), digestive, and liver functions begin, the special structures of fetal circulation are no longer needed.

149
Q

normal pulse rate is

A

75 BPM

150
Q

What is blood pressure, how is it measured

A

the pressure exerted by blood on the wall of an artery when the left ventricle undergoes systole and then diastole. It is measured by a sphygmomanometer.

151
Q

what is Systolic blood pressure

A

the force of blood recorded during ventricular contraction.

152
Q

what is Diastolic blood pressure (DBP)

A

the force of blood recorded during ventricular relaxation. The normal blood pressure of a young adult male is less than 120/80.

153
Q

What is hypertension

A

consistantly high bP

154
Q

What is an anusrym

A

is a thin, weakened section of the wall of an artery or a vein that bulges outward, forming a balloonlike sac

155
Q

What are common causes of anurysm

A

atherosclerosis, syphilis, congenital blood vessel defects, and trauma

156
Q

What happens if an anurysm is untreated

A

the aneurysm enlarges and the blood vessel wall becomes so thin that it bursts. The result is massive hemorrhage along with shock, severe pain, stroke, or death.

157
Q

What happens if an anurysm is untreated

A

the aneurysm enlarges and the blood vessel wall becomes so thin that it bursts. The result is massive hemorrhage along with shock, severe pain, stroke, or death.

158
Q

How does age impact the CV system

A

■ General changes associated with aging include reduced elasticity of blood vessels, reduction in cardiac muscle size, reduced cardiac output, and increased systolic blood pressure.
■ The incidence of coronary artery disease (CAD), congestive heart failure (CHF), and atherosclerosis increases with age.

159
Q

What is the innate immunity

A

Immunity that you are born with. this includes your skin and mucous membranes
the second innate immunity line of defense is  Phagocytes
 Anti microbial proteins
 Attack cells
 Inflammation

160
Q

What is adaptive immunity

A

-Takes longer and is more specific
-Can take up to three days for your body to recognize something and fight against it

161
Q

What are the functions of the lymphatic system

A
  1. drains excess interstitial fluid
  2. transportation
  3. immune responses
162
Q

What are the components of the lymphatic system

A

Consists of lymph, lymphatic vessels, structures and organs that contain lymphatic tissue, and red bone marrow

163
Q

Components of blood plasma filter through blood capillary walls to form _______________________________, the fluid that bathes the cells of body tissues. After interstitial fluid passes into lymphatic vessels, it is called _________

A

interstitial fluid; lymph

163
Q

Components of blood plasma filter through blood capillary walls to form _______________________________, the fluid that bathes the cells of body tissues. After interstitial fluid passes into lymphatic vessels, it is called _________

A

interstitial fluid; lymph

164
Q

Lymphatic vessels begin as lymphatic ____________ in tissue spaces between cells.

A

capillaries

165
Q

The lymphatic capillaries merge to form larger lymphatic vessels, which ultimately drain into the thoracic duct or right __________

A

lymphatic duct

166
Q

Located at intervals along lymphatic vessels are lymph nodes, masses of B cells and T cells surrounded by a ___________________

A

capsule

167
Q

How many litres of fluid will the body filter through each day. How much will stay in the system and eventually be put back

A

20;7

168
Q

What is the passage of lymph

A

-Blood capillaries (Blood plasma)
-intersitial spaces (interstitial fluid)
-lymphatic capillaries (lymph)
-lymphatic vessels + lymph nodes (lymph)
-lymphatic ducts (lymph)
-junction of jugular and subclavian veins (blood plasma)

169
Q

lymph flows due to

A

the “milking action” of skeletal muscle contractions and pressure changes that occur during inhalation

170
Q

where do t and b cells come from and where to they mature

A

Stem cells in red bone marrow give rise to mature B cells and to immature T cells that migrate to the thymus, where they mature into functional T cells.

171
Q

What is the thymus and where is it located

A

two lobed organ located posterior to the sternum, medial to the lungs, and superior to the heart

172
Q

The secondary lymphatic organs and tissues are the sites where most immune responses occur. true or false

A

true

173
Q

What are the secondary lymphatic organs

A

lymph nodes, the spleen, and lymphatic nodules

174
Q

Lymph nodes contain

A

B cells that develop into plasma cells, T cells, dendritic cells, and macrophages

175
Q

Lymph enters nodes through _________ lymphatic vessels and exits through __________ lymphatic vessels

A

afferant; efferant

176
Q

What is the single largest mass of lymphatic tissue in the body

A

Spleen

177
Q

B cells divide into plasma cells in the:

A

spleen

178
Q

macrophages phagocytize worn-out red blood cells and platelets in the

A

spleen

179
Q

What are lymphatic nodules

A

oval-shaped concentrations of lymphatic tissue that are not surrounded by a capsule

180
Q

where are lymphatic nodules found

A

throughout the mucosa of the gastrointestinal, respiratory, urinary, and reproductive tracts.

181
Q

What is innate immunities second line of defense

A

-antimicrobial
-phagocytes
-natural killer (NK) cells
-inflammation, and fever

182
Q

What is an antigen

A

any substance that the adaptive immune system recognizes as foreign (nonself). They recognize and do not attack their own tissues and cells

183
Q

What are the two types of adaptive immunity

A

cell-mediated immunity and antibody-mediated immunity

184
Q

What occurs in cell mediated immunity

A

cytotoxic T cells directly attack invading antigens.

185
Q

What is the result of clonal formation

A

is the formation of a clone of cells that can recognize the same specific antigen as the original lymphocyte

186
Q

A lymphocyte that undergoes clonal selection gives rise to two major types of cells in the clone:

A

effector cells and memory cells

187
Q

Memory cells may be:

A

helper T, cytotoxic, or B cells

188
Q

Once activated, a B cell undergoes clonal selection, forming a clone of ___________ cells and ____________________ cells.

A

plasma; memory

189
Q

what are the effector cells of a B cell clone. what do they do?

A

plasma calls, they secret eantibodies

190
Q

effects of age on lymphatic system

A

more susceptible to infections and malignancies, respond less well to vaccines, and produce more autoantibodies.

191
Q

T cell responses _____________________ with age

A

decrease

192
Q

what are the different types of T cells

A
  1. Memory T
  2. Suppressors
  3. Natural killer cells
  4. Helper T cells
  5. Cytoxic
193
Q

What is the system of lymphatic flow

A

-blood capillaries (blood plasma)
-interstitial spaces (interstitial fluid)
-lymphatic capillaries (lymph)
-lymphatic vessels + lymph nodes
-lymphatic ducts
-junction of jugular and subclavian veins (blood plasma again)

194
Q

Describe Macrophages

A

-Largest
-perform phagocytosis
-presenting info about foreign antigens to lymphocytes
-kill those things so fast

195
Q

Dendritic cells

A

-Collecting samples by covering itself with the dead bacteria
o Enters the super hwy to the lymphnodes
o Tells the T cells what to do
 One cell will recognize it and be activated by dendrites

196
Q

Neutrophils

A

-Neutrophils
-Suicide bombers
-Love killing so they kill themselves so they don’t call you
-Cause damage to your own cells
-Vomit toxic stuff everywhere

197
Q

T cell

A
  • T cell
    o Activated and rest of immune systems arise
    o T cells clone over and over
    o They will split into 2 groups
     Battlefield
     Memory
    o T cells help reactivate macrophage and then it knows what it needs to do
     It was tired and wants to give up
198
Q

What are the types of T cells

A

-Cytotoxic
-NKT
-Memory

199
Q

B cells

A

-Protein super weapons
-T cells look for these B cells
-Soldiers realize they are no longer needed and kill themselves
-T cells remain as memories
-Some B cells will stay alive and continue to produce antibodies

200
Q

what are the cells involved in cell mediated immunity

A

-helper t
-cytotoxic t
-suppressor t

201
Q

What do lymphnodes do

A

filter through lymph and remove foriegn substances through phagocyotiis, immune reactions,

Term 1 (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions