Final Exam Flashcards!
Changes in the external and internal environment are _____ that are detected by the sensory system
Stimuli
Conscious awareness of incoming sensory information is called?
Sensation
Which term best describes receptors that detect stimuli from the external environment?
Exteroceptors
These receptors respond to touch, pressure, vibration, and stretch
Mechanoreceptors
What is NOT a part of the olfactory epithelium?
Gustatory cells
The fibrous tunic of the eye is composed of two parts. What are they?
The cornea and the sclera
What part of the retina lacks photoreceptors?
The optic disc
Phototransduction is the process in which
Photoreceptors convert light energy to changes in membrane potential
What is the function of the auditory tube?
To equalize air pressure between the atmosphere and the middle ear
The part of the cochlea that converts pressure waves (from sounds) into changes in membrane potentials in the
Spiral organ
After being funneled by the auricle, sound waves pass (in sequence) through the
External acoustic meatus, tympanic membrane, ossicles, oval window
When you travel on a moving walkway or an elevator, the linear acceleration of your body is sensed by the
Utricle and saccule
Which term best describes the function of blood when considering the presence of carbon dioxide and endocrine hormones
Transportation
The temperature of blood is about _____ than measured body temperature
1*C higher
The “buffy coat” in a centrifuged blood sample is composed of
Platelets and leukocytes
The most numerous of the formed elements are the
Erythrocytes
Which most closely approximates the percentage of water in plasma by weight?
92%
The process of producing the formed elements of blood is called
Hemopoiesis
Colony - stimulation factors influence the development of specific formed elements depending on the body’s needs T/F
True
How many globins (protein building blocks) are found in a single hemoglobin molecule?
4
Which characteristics of type O blood A: has anti-A antibodies B: Has anti-B antibodies C: Has surface antigen O D: Has surface antigen A E: Has neither surface antigen A nor B
A: Has anti-A antibodies
B: Has anti-B antibodies
E: Has neither surface antigen A nor B
Which leukocytes are granulocytes? A: Neutrophils B: Eosinophils C: Lymphocytes D: Monocytes E: Basophils F: Erythrocytes
A: Neutrophils
B: Eosinophils
E: Basophils
Erythropoietin is released by the ______ in response to low blood oxygen levels
Kidney
The first phase of hemostasis involves?
Blood vessel constriction AKA Vasoconstriction
The pulmonary trunk receives blood from the right ventricle and conducts it toward the lung. The pulmonary trunk is a(n)
Artery
The receiving chambers of the heart are the atria, and the forcefully pumping chambers of the heart are the ventricles T/F
True
Which heart chambers contain deoxygenated blood?
Right atrium and right ventricle
The pericardial cavity is between the
Visceral and parietal layers of the serous pericardium
What type of tissue forms the fibrous skeleton of the heart?
Dense irregular connective tissue
The layer of the heart wall composed of cardiac muscle tissue is the
Myocardium
Which action leads to the closure of the right atrioventricular valve?
Contraction of the right ventricle
What is the sequence of events in the transmission of an impulse through the heart muscle? A: Atrioventricular node B: Atrioventricular bundle C: Sinoatrial node D: Through the atria E: Through the ventricles F: Bundle branches G: Purkinje fibers
C: Sinoatrial D: Through the atria A: Atrioventricular node B: Atrioventricular bundle F: Bundle branches G: Purkinje fibers E: Through the ventricles
In an ECG, what does the T wave represent?
Repolarization of the ventricles
During a cardiac cycle, how many of the four chambers contract at any one time?
2
Cardiac output is the amount of blood that is pumped
By a single ventricle in one minute
The function of the coronary sinus is to
Take blood from the coronary circulation to the right atrium
A network of small arteries called the ______ provides a blood supply to the tunica externa of very large vessels
Vasa Vasorum
In arteries, the thickest layer of the wall is the
Tunica media
As a venous pathway moves closer to the heart, the veins
Get larger
The largest arteries of the body are classified as
Eleatic arteries
Which is the most common type of capillary
Continuous
Blood colloid osmotic pressure is largely due to
The proteins in the blood, and it promotes reabsorption
As blood moves from the arterial end of the venous end of a capillary, net filtration pressure
Decreases, as blood hydrostatic pressure decreases
Considering the bulk flow that occurs at capillary beds, the lymphatic system is need to
Reabsorb excess fluid from the interstitial fluid
A vasodilator causes a decrease in local blood flow at a capillary bed
False
Systolic blood pressure is recorded
In arteries and is the maximal pressure that is recorded during ventricular contraction
If someone’s blood pressure were listed as 125/75 mmHg, then their pulse pressure would be
50 mmHg
The contraction of skeletal muscles plays and important role in the movement of blood in the veins T/F
True
Renin converts
Angiotensinogen to angiotensin 1
Atrial natriuretic peptide stimulates
Vasodilation, increased urine output, and therefore decreased blood pressure
Lymph contains red blood cells T/F
False
The path that fluid takes as it enters a lymphatic capillary is through
Spaces between capillary endothelial cells that are arranged as one - way flaps
The thoracic duct collects lymph from all of the following except the
Right arm
The spleen is considered a primary lymphatic structure T/F
False
B - lymphocytes are
White blood cells that are generated in red bone marrow
Lymph nodes may be found individually, or clusters in specific regions of the body. Which cluster of lymph nodes receives lymph from the head and neck
Cervical lymph nodes
Lymph nodes
Filter lymph
One of the functions of the lymphatic system is to transport fat T/F
True
The thymus gland begins to atrophy immediately after birth T/F
False
The spleen is essentially a giant lymph node, because it is encapsulated, had trabeculae, and filters lymph to remove antigens T/F
False
Interferons are one of the classes of
Cytokines
Nonspecific immunity is another name for
Innate immunity
In addition to creating a physical barrier to pathogen entry, mucus contains antimicrobial substances such as IgA T/F
True
Inflammation is a(n)
Nonspecific process that occurs in vascularized tissue
Inflamed tissue fells warm due to
Increased blood flow and increased metabolic activity
B - lymphocytes cannot bind directly with an antigen, and so require presentation by another type of cell T/F
False
Activation of lymphocytes occurs in
Secondary lymphatic structures
Most activated B - lymphocytes differentiate into
Plasma cells
Why are functions of T - lymphocytes referred to as “cell - mediated” immunity
Because T - lymphocytes are cells and not just plasma proteins
An immunoglobulin is a(n)
Antibody, which is a protein molecule
IgA is primarily found
In external secretions such as tears, saliva, and mucus
In passive immunity, the individual has not had an antigenic challenge T/F
True
A variety of lymphatic cells are involved in the immune response in the immune response. Which is not part of the process
Replication of antigens
Which is not part of the conducting portion of the respiratory system?
Alveoli
Several things happen to inhaled air in a process called conditioning. Select and exception
The air is cooled
Which bone does not contain a paranasal sinus?
Mandible`
What structure is also known as the “voice box”?
Larynx
What type of tissue lines the trachea
Pseudostratified ciliated columnar epithelium
Bronchoconstriction results from relaxation of smooth muscle in the walls of airways T/F
False
On each side of the chest, the ______ pleura lines the internal thoracic wall and the ______ pleura tightly covers the lung
Parietal; visceral
Organized the items listed into the proper sequence of events for gas exchange A: O2 is transported to cells by circulatory system B: O2 is drawn into the lungs during inhalation C: cells use O2 and generate CO2 D: CO2 is exhaled E: The circulatory system transports CO2 to the lungs
B: O2 in drawn into the lungs during inhalation
A: O2 is transported to cell by circulatory system
C: Cells use O2 and generate CO2
E: The circulatory system transports CO2 to the lungs
D: CO2 is exhaled
Air flows out of the body during expiration because
Intrapulmonary pressure is greater than atmospheric pressure
Where would you find the trachealis muscle?
Between the esophagus and the trachea
The amount of sir that can be forcibly inhaled after a normal inspiration is the
Inspiratory reserve volume
When a parietal pressure gradient exists for a gas, it will move from the area of its lower pressure to the area of higher partial pressure
False
The exchange of oxygen and carbon dioxide between the air in the alveoli and blood in the lungs is called
External respiration
Most carbon dioxide is transported through the blood as bicarbonate dissolved in plasma T/F
True
In addition to oxygen, hemoglobin also transports
Carbon dioxide and hydrogen ions
The ______ transfer from the kidneys to the urinary bladder
Ureters
The kidneys are located ______ the peritoneum
Posterior to
The first structure in the kidney to collect newly formed urine is the
Minor calyx
Cortical nephrons have their corpuscles near the _______ edge of the cortex and are the ______ common type of nephron
Peripheral; more
Granular cells synthesize and release the enzyme
Renin
What is the correct sequence of arteries that a drop of blood would flow through as it entered the kidney and moved toward a glomerulus
Renal artery - segmental artery - interlobular artery - accurate artery - interlobular artery
Which step(s) in the process of urine formation occur in the renal tubule
Secretion and reabsorption only
The endothelium of the glomerulus is made up of ______ capillaries
Fenestrated
Podocytes are cells with foot - like processes called pedicels. Podocytes are found in the
Visceral layer of the glomerular capsule
The hormone ANP is released from the heart and causes the urinary system to
Increase in urine volume and decrease in blood volume
The reabsorption of both sodium and potassium is carefully regulated T/F
True
The muscularis layer of the urinary bladder is commonly called the ______ muscle
Detrusor
At which stage of life is the percentage of fluid in the human body highest
Infancy
When compared to extracellular fluid, intracellular fluid contains
More potassium and more negatively charges proteins
As an individual becomes dehydrated, the net movement of fluid in their body id from cells toward plasma T/F
True
Fluid intake causes blood volume to increase T/F
True
The thirst center of the brain is located in the
Hypothalamus
The most abundant cation within cells is
Potassium
Angiotensin 2 stimulates the adrenal cortex to release antidiuretic hormone T/F
False
An individual who consumes many antacids for stomach upset and many diuretic for high blood pressure will be be at risk for metabolic
Alkalosis
Renal compensation for acidosis results in
Urine with a low pH and an elevation of blood bicarbonate levels
To compensate for metabolic acidosis, the respiratory system increases breathing rate, which lowers that partial pressure of carbon dioxide below normal levels T/F
True
What organ is not part of the gastrointestinal tract?
Liver
An organ that helps break down food but is not part of the tube through which the foodstuffs pass is referred to as a(n)
Accessory digestive organ
The initial site of both mechanical and chemical digestion
Oral cavity
Lipid molecules that are absorbed from the GI tract enter
Lacteals
The term “retroperitoneal” may be used to describe the location of certain abdominal organs. This means that such organs are located
Posterior to the parietal peritoneum
“Segmentation” within the small intestine refers to the
Back - and - forth motion that mixes chyme with glandular secretions
What is the primary function of the large intesstine
Water and electrolyte absorption
The enzyme pepsin becomes active when pH is
Low
What is the substance secreted by the G cells of the gastric glands
Gastrin
Put the tunics of the GI tract wall in correct order from deep to superficial
Mucosa - submucosa - tunica muscularis - serosa
Which of the following is NOT part of the biliary apparatus
Transverse bile duct
Which gastric gland cell secretes alkaline mucin
Surface mucous cell
When chyme leaves the stomach, what does it enter next?
Duodenum
What is the blood vessel in the middle of the liver lobule that receives blood from the hepatic sinusoids?
Central vein
Triglycerides and steroids are both examples of
Lipids
A nonessential amino acid is now that
Can be made with the body
Vitamin C is a
Water - soluble, essential vitamin
A deficiency in vitamin ______ may lead to bleeding problems
Vitamin K
Are minerals organic molecules
No
Honey, fruit and milk are all sources of
Sugars
The absorptive state occurs
From when you are eating until about 4 hours after the meal
One of the ultimate effects of insulin is to stimulate protein synthesis within cells of the body T/F
True
High - density lipoproteins (HDLs) are associated with the transport of lipids from the
Peripheral tissues to the liver
When glucose enters glycolysis, it
Is oxidized to pyruvate molecules
Is protein a macronutrient?
Yes
Does glycolysis require oxygen?
No
Which step in cellular respiration produces the most ATP?
Electron transport system
The coenzymes that will provide the electrons needed for the electron transport system are
NADH and FADH2
Which of the following is the product of the citric acid cycle
Carbon dioxide molecules
What is the correct order for the phases of the ovarian cycle, beginning with day 1
Follicular, ovulation, luteal
What are fimbriae?
Fingerlike projection at the opening of the uterine tube
The myometrium of the uterus is composed of
Smooth muscle
What do the interstitial cells in the testes
Secrete testosterone
What to the rete testis receive?
Sperm from the seminiferous tubules
Which of the following is the neck of the uterus that projects into the vagina
Cervix
After ovulation, the oocyte does?
It releases chemotoxic signals to attract sperm to its location
Cleavage occurs during
The pre - embryonic period
The fingerlike structures of the placenta that form from its fetal portion are known as
Chorionic Villi
The secondary trimester of a pregnancy includes months
4 - 6
Shortly after birth the foramen ovale of the fetal heart ceases to function as an open pathway for blood T/F
True