Biology 2060 - Anatomy and Physiology II » Summer 2021 » Heart Quiz
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Question #1
All of the heart's sulci house blood vessels that supply the myocardium.
A.
FALSE
B.
TRUE
Question #2
The layer of the heart wall composed of cardiac muscle tissue is the
A.
myocardium.
B.
endocardium.
C.
pericardial cavity.
D.
pectinate muscle.
E.
pericardium.
Question #3
The term "epicardium" is another name for the
A.
visceral layer of the serosal pericardium.
B.
myocardium.
C.
parietal layer of the serosal pericardium.
D.
mediastinum.
E.
external layer of the fibrous pericardium.
Question #4
Which of the following would cause a decrease in cardiac output?
A.
An increase in heart rate
B.
An increase in afterload
C.
An increase in venous return
D.
Addition of positive inotropic agents
Question #5
As with action potentials in other types of cells, the repolarization of cardiac muscle cells involves the
A.
entrance of calcium through voltage-gated channels.
B.
entrance of sodium through voltage-gated channels.
C.
simultaneous closure of sodium channels and opening of calcium channels.
D.
binding of ACh to ACh receptor.
E.
exit of potassium through voltage-gated channels.
Question #6
Large doses of certain stimulants can lead to dangerous increases in heart rates. Such a stimulant is a
A.
negative inotropic agent.
B.
positive chronotropic agent.
C.
positive inotropic agent.
D.
negative chronotropic agent.
Question #7
Nodal cells contain fast voltage-gated calcium channels.
A.
TRUE
B.
FALSE
Question #8
Myofibrils within cardiac muscle cells are aligned in sarcomeres.
A.
TRUE
B.
FALSE
Question #9
Which type of muscle cell exhibits a longer refractory period?
A.
Skeletal muscle cell
B.
Cardiac muscle cell
Question #10
Most of the calcium that triggers contraction of cardiac muscle comes
A.
into the cell through leakage channels in the sarcolemma.
B.
from the Golgi apparatus of the cell.
C.
from the sarcoplasmic reticulum of the cell.
D.
into the cell through voltage-gated channels in the sarcolemma.
Question #11
Which pair is located more anteriorly in a heart in normal position?
A.
Right atrium and right ventricle
B.
Left atrium and left ventricle
C.
Right atrium and left atrium
D.
Right atrium and left ventricle
E.
Left atrium and right ventricle
Question #12
The pulmonary trunk receives blood from the right ventricle and conducts it toward the lung. The pulmonary trunk is a(n)
A.
artery.
B.
capillary.
C.
vein.
Question #13
How many half-moon shaped, pocketlike cusps are found in each semilunar valve?
A.
4
B.
2
C.
6
D.
3
Question #14
During the S-T segment, what is occurring within cardiac muscle cells?
A.
Potassium is entering atrial cells and sodium is leaving ventricular cells.
B.
Calcium is entering and potassium is leaving ventricular cells.
C.
Sodium is rapidly diffusing out of atrial muscle cells.
D.
Sodium channels are beginning to open in ventricular cells and calcium is entering through slow channels in atrial cells.
Question #15
The right border of the heart is supplied by the
A.
circumflex artery.
B.
anterior interventricular artery.
C.
great cardiac vein.
D.
right marginal artery.
E.
posterior interventricular artery.
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