circulation test pt 2 Flashcards

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1
Q

The structures attached to the atrioventricular valves are called

A

chordae tendineae.

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2
Q

The main function of the valves in the heart is to

A

prevent back-flow of blood.

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3
Q

Blood leaves the right ventricle via the

A

pulmonary trunk.

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4
Q

An irregular heartbeat where contraction of the atria does not always result in contraction of the ventricles, likely indicates a problem with the

A

AV node.

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5
Q

A condition called tachycardia exists when a person’s heart rate is abnormally high. Which of the following explains how tachycardia may arise?

A

The sinoatrial (SA) node is receiving increased stimulation.

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6
Q

The atrioventricular (AV) node stimulates the

A

Purkinje fibers

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7
Q

The coordinating structure responsible for an intrinsic heart beat is the

A

sinoatrial node

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8
Q

What happens during atrial diastole?

A

Atria fill with blood.

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9
Q

Use the following information to answer the question.
1. Systole of the ventricles.
2. Opening of the atrio-ventricular valves.
3. Electrical impulse sent from the SA node.
4. Atria fill with blood.
The order in which the events above occur during one heartbeat (the cardiac cycle) is

A

4, 3, 2, 1
Atria fill with blood.
Electrical impulse sent from the SA node
Opening of the atrio-ventricular valves.
Systole of the ventricles.

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10
Q

The blood vessels that carry blood to and from the head are the

A

Carotid arteries and jugular veins.

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11
Q

The path followed by blood on one circuit through the heart is

A

atrium, atrioventricular valve, ventricle, semilunar valve.

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