Lab #5 Information Quiz Flashcards

1
Q

What test is used to measure the electrical activity of the heart?

A

electrocardiogram

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2
Q

What structures in heart muscle allows action potential from the heart’s conduction system to spread through the cardiac muscle fibers?

A

Intercalated discs

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3
Q

During the cardiac cycle, which valves open when the ventricles contract?

A

pulmonary semilunar valves and aortic semilunar valves

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4
Q

During a cardiac cycle, when the ventricles fill with blood, which valves close?

A

Atrioventricular valves (AV Valves)

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5
Q

A pause in the electrical impulse transmission of the heart occurs at the

A

atrioventricular node(AV node)

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6
Q

Electrical impulses of the heart are initiated at the

A

sinoatrial node (SA Node)

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7
Q

The amount of blood pumped out of the heart in one cardiac cycle:

A

Stroke volume

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8
Q

The difference between an individuals resting cardiac output and their maximum cardiac output is called:

A

cardiac reserve

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9
Q

Ventricular relaxation and expansion is known as the:

A

diastole

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10
Q

Blood leaves the heart to enter the systematic circulation through which structure?

A

Aorta

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11
Q

Ventricular contraction and constriction is known as

A

systole

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12
Q

The bundle of HIS divides into what structure?

A

Right and left BUNDLE BRANCHES.

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13
Q

Which cells compose the myocardium?

A

Cardiomyocytes
(Heart muscle cells)

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14
Q

Oxygenated blood from the lungs enters the heart at the:

A

Left atrium-pulmonary veins enter the heart through the left atrium.

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15
Q

The amount of blood pumped by the heart in one minute is called:

A

cardiac output

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