QUIZ 4 Flashcards Preview

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Flashcards in QUIZ 4 Deck (9)
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1
Q

The heart lies within the

A

mediastinum

2
Q

The heart wall consists largely of a middle layer of muscular tissue called the

A

myocardium, which performs the pumping action of the heart.

3
Q

Each of the cardiac valves opens and closes in response to

A

changes in pressure and insures one-way blood flow through the heart.

4
Q

Blood in the coronary sinus will drain into the

A

right atrium.

5
Q

The coronary circulation

A

is not part of the pulmonary circuit.

6
Q

The primary pacemaker of the heart is the

A

SA node.Heart sounds are the results of the cardiac valves closing.

7
Q

Cardiac output is the product of the

A

stroke volume and the heart rate.

8
Q

Regular exercise tends to

A

reduce resting heart rate in both males and females.

9
Q

A person’s cardiovascular fitness can be

A

improved with regular exercise.