Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Bio 224 Dextur > bio 224 heart > Flashcards

bio 224 heart Flashcards

1
Q

AV valves

A

Mitral ( bicuspid)
tricuspid

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

Semilunar valves

A

Aortic and pulmonary

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

Blood pressure

A

Heart maintains homeostasis of pressure that blood exerts on blood vessels

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

Atrial natriuretic peptides ( ANP)

A

Heart also acts as endocrine organs
- It lowers BP by decresing sodium ion retention in kidneys

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

layers of the heart wall from innermost to superfical

A

endocardium, myocardum and epicardium

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

Layers of the heart from outer to inner

A

Fibrous peri, parietal peri, visceral peri

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

How blood flows through the heart how many steps

A

9 steps

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

1.

A

Blood in systemic capillaries delivers oxygen to body cells

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

2.

A

Systemic veins returns deoxygenated blood to the right atrium

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

3.

A

blood passes from the right atrium through the tricuspid valve to the right ventricle

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

4.

A

right ventricle pumps blood through pulmonary valve to the pulmonary trunk

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

5.

A

pulmonary trunk delivers blood to the pulmonary capillaries of the left and right lungs

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

6.

A

Blood becomes oxygenated in pulm. capillaries and the pulm. veins return oxygenated blood to the left atrium

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

7.

A

Blood passes from left atrium through mitral valve to the left ventricle

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

8.

A

Left ventricle pumps blood through aortic valve to aorta

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

9.

A

Aorta delivers blood to the systemic capillaries and cycle continues

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Anastomoses

A

systems of channels fromed between blood vessels

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

Collateral circulation

A

Blood flow to myocardium is insufficient occasionally NEW anastomoses will form to provide alternative routes of blood flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Collaterals

A

Help protect muscle cells form damage that could result from blocked vessels

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

CAD

A

Coronary artery disease

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

What is CAD

A

Leading cause of death worldWIDE
- It is a buildup of fatty plaque
- decreases blood flow to myocardium
- Inadequate oxygenation of myocardium

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

Angina pectoris

A

Chest pain

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

Myocardial ischemia

A

Lack of oxygen to heart muscle

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

Myocardial infraction

A
  • Occur when plaques in coronary arteries rupture
  • Obstructs blood flow to myocardium
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Myocardial infraction symptoms
Chest pain that RADIATES to left arm or left sid eof neck, shortness of breathing, sweating, anxiety and nausea
21
For myocardial infarction women _____ present with chest pain but may suffer ____________
may not; back, jaw or arm pain instead
22
Audtorhythmicity
Heart does not require conscious intervention to elict cardiac muscle to contract
23
Action potentials
Cardiac muscle cells contract in response
24
Pacemaker cells
Cardiac electrical activity is coordinated by very small, unique population of cardiac muscle cells
25
Contractile cells
Cells rhythmically and spontaneously generate action potentials
26
SA node
Upper right atrium , 60 bpm, Rate is subject to influence from sympathetic and parasympathetic nervous system
27
AV node
Lower right atrium , 40 bpm
28
Purkinje fiber system
20 bpm, ventricles
29
Membrane potential
voltage differnece that exists across membranes excitable cells
30
Resting membrane potential
Differ. in concentration of ions across plasma membrane in cells at rest
31
Current
flow of ions or electrons with chem or electrical gradient
32
Depolarization
change in resting membrane potential to value LESS negative than when at rest
33
Repolarization
returns of cell to its negative retsing membrane potential
34
p wave
atrial depolorization
35
qrs complex
ventricualr depolarization
36
t wave
ventricualr repolarization
37
r-r interval
Entire duration of a cardiac action potential
37
p-r interval
duration of atrial depolarization and AV node dealy
38
q-t interval
entire duration of a ventricular action potential
39
pressure changes casued by contractions drive blood flow though heart with valves ______
preventing backflow
39
s-t segment
flat because it is recorded during plateau phase of ventricles
40
cardiac cycle
squence of events within heart from one heartbeat to next
41
Systole
contraction
41
High pressure in the ventricle causes blood flow that pushes the aortic valve to____ and pushes the blood up to ___ valve to ___ it
open, mitral, close
42
S1
Lub, AV valve close
43
S2
dub, semilunar valve close
44
Cycle four main phases
filling contraction ejection relaxation
44
Diastole
relaxation
45
Ventricualr filling
- ventricles fill with blood and are in diastole - 80% total blood volume of artia drains passivley in this manner into ventricles
46
Isovolumetric contraction
- AV and Semilunar valve close when enough pressure builds in the ventricles - s1 sound heard
47
Ventricualr ejection phase
- pressure opens in SL valves and blood is ejcted into the pulmonary artery and aorta - 70 ml of blood pumped from each ventricle; 50 ml of blood remains in each ventricle
48
Isovolumetric relaxation
- SL valves snap shut; s2 is heard - Blood is not being ejected or entering ventricles - volume remains constant
49
Heart rate
how many cardiac cycles or beats per minute
50
stroke volume
ammount of blood puped in one cycle
51
cardiac outout
blood pumped out of heart in 1 minute
52
Preload
vloume of blood coming in from the pulmonary circuit
53
afterload
pressure in the systemic circuit
54
Contractillity
heart intrinsic pumping ability
55
Frank starling law
volume of blood discharged from heart is equal to volume that enters it
56
Factors that influence rate
Pos chronotropic = Increase rate neg chronotropuc = decrease rate
57
Factors that influence contractility
pos inotropic = increase contractility neg inotropic = decrease contractility
58
Heart failure
generally results in decreased stroke vloume which in trun reduces cardiac output
59
pulmonary edema
blood flow increases oressure in these vessels driving fluid out of pulmonary capillaries into lungs

Bio 224 Dextur (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions