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A&P 2402 Chpt. 18 Quiz

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Chpt. 18 Quiz for Exam #1

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1

The layers of the heart wall from superficial to deep are:

epicardium, endocardium, and myocardium.

myocardium, endocardium, and epicardium.

endocardium, myocardium, and epicardium.

epicardium, myocardium, and endocardium.

epicardium, myocardium, and endocardium, pg. 663

2

Which of the following is not a difference between the left and right ventricles?

The left ventricle is a more powerful pump than the right ventricle.

The left ventricle receives a smaller percentage of coronary blood supply than the right ventricle.

The walls of the left ventricle are thicker than the walls of the right ventricle.

The left ventricle pumps blood to the systemic circuit, while the right ventricle pumps blood to the pulmonary circuit

The left ventricle receives a smaller percentage of coronary blood supply than the right ventricle., pg. 668

3

Blood within the pulmonary veins returns to the ________.

right atrium

right ventricle

left atrium

left ventricle

left atrium, pg. 664

4

The term for pain associated with deficient blood delivery to the heart that may be caused by the transient spasm of coronary arteries is ________.

ischemia

angina pectoris

myocardial infarct

pericarditis

angina pectoris, pg. 670

5

The role of the coronary arteries is to:

supply blood to the heart tissue.

direct blood to the pulmonary veins.

move blood from the atria to the ventricles.

direct blood to the aorta.

supply blood to the heart tissue, pg 668

6

Small muscle masses attached to the chordae tendineae are the ________.

trabeculae carneae

papillary muscles

pectinate muscles

venae cavae

papillary muscles, pg. 662 & 665

7

The order of impulse conduction in the heart, from beginning to end, is:

SA node, bundle branches, bundle of His, AV node, and Purkinje fibers.

SA node, bundle of His, AV node, bundle branches, and Purkinje fibers.

SA node, AV node, bundle of His, bundle branches, and Purkinje fibers.

SA node, bundle branches, AV node, bundle of His, and Purkinje fibers

SA node, AV node, bundle of His, bundle branches, and Purkinje fibers, pg 675

8

The P wave of a normal electrocardiogram indicates ________.

ventricular repolarization

atrial depolarization

atrial repolarization

ventricular depolarization

atrial depolarization, pg 677

9

The second heart sound is heard during which phase of the cardiac cycle?

ventricular ejection

isovolumetric contraction

isovolumetric relaxation

ventricular filling

isovolumetric relaxation, pg. 681

10

CO = ________ × SV

HR, pg. 681

11

Drag the appropriate labels to their respective targets

Pic on Iphone

12

In what direction does blood flow through the heart?

from a region of high volume to a region of low volume

from a region of high oxygen content to a region of low oxygen content

from ventricles to atria

from a region of high pressure to a region of low pressure

from a region of high pressure to a region of low pressure

13

Atrial pressure is greater than ventricular pressure during which phase of the cardiac cycle?

ventricular ejection

isovolumetric contraction

atrial contraction

isovolumetric relaxation

atrial contraction

14

At what point during the cardiac cycle does the AV valve close?

when ventricular pressure becomes greater than atrial pressure

when the semilunar valve opens

when ventricular pressure becomes greater than aortic pressure

when aortic pressure becomes greater than ventricular pressure

when ventricular pressure becomes greater than atrial pressure

15

At what point in the cardiac cycle does the semilunar valve open?

when atrial pressure becomes greater than ventricular pressure

when ventricular pressure becomes greater than aortic pressure

when ventricular pressure becomes greater than atrial pressure

when the AV valve closes

when ventricular pressure becomes greater than aortic pressure

16

Ventricular pressure is greater than aortic pressure during which phase of the cardiac cycle?

ventricular filling

isovolumetric relaxation

ventricular ejection

isovolumetric contraction

ventricular ejection

17

At what point in the cardiac cycle does the semilunar valve close?

when pressure in the ventricle becomes less than aortic pressure

when ventricular pressure becomes greater than atrial pressure

when ventricular pressure becomes greater than aortic pressure

when atrial pressure becomes greater than ventricular pressure

when pressure in the ventricle becomes less than aortic pressure

18

Isovolumetric relaxation is characterized by which of the following?

Pressure in the atrium exceeds pressure in the ventricle.

Pressure in the ventricle exceeds pressure in the aorta.

The semilunar and AV valves are closed.

Blood flows backward through the heart from high to low pressure

The semilunar and AV valves are closed

19

At what point in the cardiac cycle does the AV valve open?

when atrial pressure becomes greater than ventricular pressure

when the semilunar valve closes

when ventricular pressure becomes greater than aortic pressure

when aortic pressure becomes greater than ventricular pressure

when atrial pressure becomes greater than ventricular pressure

20

What is the main function of heart valves?

to separate the atria and ventricles

to pump blood through the heart

to separate the left and right atria

to prevent backward flow of blood

no data

21

When the atria contract, which of the following is true?

The AV valves are closed.

The atria are in diastole.

The semilunar valves are open.

The ventricles are in diastole

The ventricles are in diastole, pg.680

22

Which of the following is equivalent to the ventricular volume during isovolumetric contraction?

the end systolic volume (ESV)

The end diastolic volume (EDV)

the stroke volume (SV)

the minimum ventricular volume (MVV)

no data

23

Which of the following is true during ventricular systole?

The AV valves are closed.

The atria are in systole.

The ventricles are empty.

The ventricles are relaxed

The AV valves are closed, pg. 681

24

During the ventricular ejection phase of the cardiac cycle, which of the following is true?

The AV valves are open.

The ventricles are in diastole.

The atria are in systole.

The semilunar valves are open

The semilunar valves are open, pg. 681

25

Most of the decrease in ventricular volume takes place during which phase of the cardiac cycle?

atrial contraction

ventricular filling

isovolumetric relaxation

ventricular ejection

ventricular ejection, pg. 681

26

Which of the following is equivalent to the ventricular volume during isovolumetric relaxation?

end systolic volume (ESV)

maximum ventricular volume (MVV)

stroke volume (SV)

end diastolic volume (EDV)

end systolic volume (ESV), pg. 681

27

Most of the increase in left ventricular volume takes place during what phase of the cardiac cycle?

atrial contraction

ventricular filling

isovolumetric relaxation

ventricular ejection

ventricular filling, pg. 680


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