BIOL 160 – The endocardium of the heart, contracts to develop a force

10 Jun BIOL 160 – The endocardium of the heart, contracts to develop a force

Question
Question 1

The endocardium of the heart

Question 1 options:

A)

contracts to develop a force.

B)

is part of the conduction system.

C)

lines the inside of the chambers.

D)

prevents the backflow of blood.

E)

transports blood through the chambers.

Question 2

The ________ circuit is between the heart and lungs.

Question 2 options:

A)

cardiac

B)

coronary

C)

hepatic

D)

lymphatic

E)

pulmonary

Question 3

Blood is pumped into the pulmonary arteries by the

Question 3 options:

A)

left atrium

B)

right ventricle

C)

left ventricle

D)

valves

E)

right atrium

Question 4

Blood is pumped into the aorta by the

Question 4 options:

A)

left atrium

B)

right ventricle

C)

left ventricle

D)

valves

E)

right atrium

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Question 5(1 point)

Blood leaves the heart via the

Question 5 options:

A)

left atrium

B)

aorta

C)

right atrium

D)

right ventricle

E)

valves

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Question 6(1 point)

The tricuspid valve prevents the backflow of blood from the

Question 6 options:

A)

aorta to the left ventricle

B)

left ventricle to the left atrium

C)

pacemaker to both atria

D)

pulmonary artery to the right ventricle

E)

right ventricle to the right atrium.

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Question 7(1 point)

The SA node is located in the wall of the

Question 7 options:

A)

right atrium

B)

aorta

C)

left atrium

D)

right ventricle

E)

left ventricle

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Question 8(1 point)

The inherent rhythm of the SA node is about ________ beats per minute.

Question 8 options:

A)

20

B)

40

C)

60

D)

75

E)

100

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Question 9(1 point)

Normally, at rest, the rate of heart beat is about ________ beats per minute.

Question 9 options:

A)

10

B)

30

C)

50

D)

70

E)

100

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Question 10(1 point)

From a resting state, the polarity of the cardiac muscle cells changes with the influx of ________ ions into the cells.

Question 10 options:

A)

chloride

B)

iron

C)

potassium

D)

zinc

E)

sodium

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Question 11(1 point)

The QRS wave of the ECG represents

Question 11 options:

A)

atrial contraction

B)

ventricular contraction

C)

atrial relaxation.

D)

ventricular relaxation

E)

firing of the SA node

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Question 12(1 point)

The T wave of the ECG represents

Question 12 options:

A)

ventricular relaxation

B)

ventricular contraction

C)

atrial relaxation

D)

atrial contraction

E)

firing of the SA node

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Question 13(1 point)

The term “angina” refers to the ________ of the heart attack.

Question 13 options:

A)

blockage

B)

oxygen deficiency

C)

location

D)

pain

E)

relief

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Question 14(1 point)

The most extensive, branching blood vessels are the

Question 14 options:

A)

arterioles

B)

arteries

C)

capillaries

D)

veins

E)

venules

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Question 15(1 point)

Arteries consist of ________ different layers.

Question 15 options:

A)

2

B)

3

C)

4

D)

5

E)

6

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Question 16(1 point)

The sphygmomanometer measures

Question 16 options:

A)

blood cell concentrations

B)

heart size

C)

heart electrical activity

D)

valve activity

E)

blood pressure

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Question 17(1 point)

A typical diastolic pressure is about

Question 17 options:

A)

20

B)

40

C)

70

D)

120

E)

160

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Question 18(1 point)

Valves are found in the

Question 18 options:

A)

arteries and arterioles.

B)

heart and capillaries

C)

arterioles and capillaries

D)

veins and arterioles

E)

heart and veins

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Question 19(1 point)

A varicose condition can develop in the

Question 19 options:

A)

arterioles

B)

arteries

C)

capillaries

D)

heart

E)

veins

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Question 20(1 point)

Which of the events below does not occur when the semilunar valves are open?

Question 20 options:

A)

Ventricles are in diastole.

B)

Blood enters pulmonary arteries and the aorta.

C)

AV valves are closed.

D)

Ventricles are in systole

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Question 21(1 point)

The lymphatic system

Question 21 options:

A)

produces blood cells

B)

carries oxygen.

C)

creates blood pressure.

D)

stores protein.

E)

helps to return fluid lost in the capillary bed back into the bloodstream.

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Question 22(1 point)

The tricuspid valve is closed ________.

Question 22 options:

A)

while the ventricle is in diastole

B)

when the ventricle is in systole

C)

while the atrium is contracting

D)

by the movement of blood from atrium to ventricle

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Question 23(1 point)

The source of blood carried to capillaries in the myocardium would be the ________.

Question 23 options:

A)

coronary sinus

B)

fossa ovalis

C)

coronary arteries

D)

coronary veins

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Question 24(1 point)

Foramen ovale ________.

Question 24 options:

A)

connects the two atria in the fetal heart

B)

connects the two atria in the fetal heart

B) is a condition in which the heart valves do not completely close

C)

is a shallow depression in the interventricular septum

D)

is a connection between the pulmonary trunk and the aorta in the fetus

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Question 25(1 point)

When viewing a dissected heart, it is easy to visually discern the right and left ventricles by ________

Question 25 options:

A)

tracing out where the auricles connect

B)

noticing the thickness of the ventricle walls

C)

locating the apex

D)

finding the papillary muscles

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Question 26(1 point)

Compared to skeletal muscle, cardiac muscle ________.

Question 26 options:

A)

has gap junctions that allow it to act as a functional syncytium

B)

lacks striations

C)

has more nuclei per cell

D)

cells are larger than skeletal muscle cells

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Question 27(1 point)

The pericardium surrounds the heart.

Question 27 options:

True

False

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Question 28(1 point)

The inferior vena cava returns blood to the right atrium.

Question 28 options:

True

False

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Question 29(1 point)

The pulmonary veins return blood to the right atrium.

Question 29 options:

True

False

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Question 30(1 point)

The chordae tendineae are located in the atria.

Question 30 options:

True

False

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Question 31(1 point)

The myocardial ischemia is the heart attack.

Question 31 options:

True

False

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Question 32(1 point)

During danger, the bloodflow to the digestive tract is reduced.

Question 32 options:

True

False

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