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.
endocardium.
B.
pectinate muscle.
C.
myocardium.
D.
pericardial cavity.
E.
pericardium.
Question #3
The term "epicardium" is another name for the
A.
parietal layer of the serosal pericardium.
B.
myocardium.
C.
mediastinum.
D.
visceral layer of the serosal pericardium.
E.
external layer of the fibrous pericardium.
Question #4
Which of the following would cause a decrease in cardiac output?
A.
An increase in afterload
B.
Addition of positive inotropic agents
C.
An increase in venous return
D.
An increase in heart rate
Question #5
As with action potentials in other types of cells, the repolarization of cardiac muscle cells involves the
A.
entrance of sodium through voltage-gated channels.
B.
simultaneous closure of sodium channels and opening of calcium channels.
C.
binding of ACh to ACh receptor.
D.
entrance of calcium through voltage-gated channels.
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.
Cardiac muscle cell
B.
Skeletal muscle cell
Question #10
Most of the calcium that triggers contraction of cardiac muscle comes
A.
from the sarcoplasmic reticulum of the cell.
B.
from the Golgi apparatus of the cell.
C.
into the cell through leakage channels in the sarcolemma.
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.
Left atrium and right ventricle
B.
Right atrium and left ventricle
C.
Right atrium and right ventricle
D.
Left atrium and left ventricle
E.
Right atrium and left atrium
Question #12
The pulmonary trunk receives blood from the right ventricle and conducts it toward the lung. The pulmonary trunk is a(n)
A.
capillary.
B.
vein.
C.
artery.
Question #13
How many half-moon shaped, pocketlike cusps are found in each semilunar valve?
A.
3
B.
6
C.
2
D.
4
Question #14
During the S-T segment, what is occurring within cardiac muscle cells?
A.
Sodium channels are beginning to open in ventricular cells and calcium is entering through slow channels in atrial cells.
B.
Sodium is rapidly diffusing out of atrial muscle cells.
C.
Potassium is entering atrial cells and sodium is leaving ventricular cells.
D.
Calcium is entering and potassium is leaving ventricular cells.
Question #15
The right border of the heart is supplied by the
A.
posterior interventricular artery.
B.
right marginal artery.
C.
anterior interventricular artery.
D.
circumflex artery.
E.
great cardiac vein.
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