Study Guide 3

Question 1

pace maker of the heart

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Question 2

length of the cardiac cycle at 72 beats/minute

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Question 3

indicates the depolarization of the atria

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Question 4

a recording of the electrical activity of the heart

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Question 5

indicates depolarization of the ventricles on ECG

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Question 6

contraction phase of the ventricles

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Question 7

carry impulses to myocardium

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Question 8

relaxation phase of the ventricles

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Question 9

distributes excitation to the ventricules

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Question 10

cells that can initiate excitation

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Question 11

SA node is located

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Question 12

located in between atriums and ventricles

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Question 13

heart muscle is none responsive to a stimuli

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Question 14

when frequency of stimulation is increased

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Question 15

contraction in any of the chambers

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Question 16

relaxation in any of the chambers

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Question 17

Does the phrase refer to ventricular systole or ventricular diastole?
atria are in systole

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Question 18

Does the phrase refer to ventricular systole or ventricular diastole?
atrioventricular valves are open

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Question 19

Does the phrase refer to ventricular systole or ventricular diastole?
atrioventricular valves are closed

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Question 20

Does the phrase refer to ventricular systole or ventricular diastole?
semilunar valves are open

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Question 21

Does the phrase refer to ventricular systole or ventricular diastole?
blood is ejected from the heart

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Question 22

Does the phrase refer to ventricular systole or ventricular diastole?
pressure in ventricles decreases

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Question 23

Does the phrase refer to ventricular systole or ventricular diastole?
blood enters the ventricles

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Question 24

Please give in order cycles of the cardiac cycle starting from isovolumetric relaxation

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Question 25

T/F: Cardiac output equals rate plus stroke volume.

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Question 26

T/F: Stroke volume is the amount of blood ejected from the heart during each minute.

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Question 27

T/F: Contractile strength of the heart muscle can have an effect on the stroke volume.

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Question 28

T/F: increased venous return decreases contraction strength.

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Question 29

T/F: heart rate will not have any effect on the stroke volume.

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Question 30

Please list differences between skeletal muscle and cardiac muscle look up variations in their histology to physiology?

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Question 31

This type of contraction muscle that is generating force is lengthening ?

a) Eccentric
b) Concentric
c) Isometric

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Question 32

This type of muscle fiber is fatigue resistant and has the highest myoglobin content.

a) Fast twitch fibers
b) Slow oxidative
c) Fast oxidative

Answer 32

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