QUIZ 4 Flashcards
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.
