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Download MCQ Quiz PDF eBook
Question: The influx of which ion accounts for the plateau phase?
Choices:
sodium
potassium
chloride
calcium
Question: In which septum is it normal to find openings in the adult?
Choices:
interatrial septum
interventricular septum
atrioventricular septum
all of the above
Question: Which portion of the ECG corresponds to repolarization of the atria?
Choices:
P wave
QRS complex
T wave
none of the above: atrial repolarization is masked by ventricular depolarization
Question: Which valve separates the left atrium from the left ventricle?
Choices:
mitral
tricuspid
pulmonary
aortic
Question: Which of the following is not important in preventing backflow of blood?
Choices:
chordae tendineae
papillary muscles
AV valves
endocardium
Question: The ________ layer secretes chemicals that help to regulate ionic environments and strength of contraction and serve as powerful vasoconstrictors.
Choices:
pericardial sac
endocardium
myocardium
epicardium
Question: Which component of the heart conduction system would have the slowest rate of firing?
Choices:
atrioventricular node
atrioventricular bundle
bundle branches
Purkinje fibers
Question: Which of the following lists the valves in the order through which the blood flows from the vena cava through the heart?
Choices:
tricuspid, pulmonary semilunar, bicuspid, aortic semilunar
mitral, pulmonary semilunar, bicuspid, aortic semilunar
aortic semilunar, pulmonary semilunar, tricuspid, bicuspid
bicuspid, aortic semilunar, tricuspid, pulmonary semilunar
Question: The myocardium would be the thickest in the ________.
Choices:
left atrium
left ventricle
right atrium
right ventricle
Question: Which of the following is unique to cardiac muscle cells?
Choices:
Only cardiac muscle contains a sarcoplasmic reticulum.
Only cardiac muscle has gap junctions.
Only cardiac muscle is capable of autorhythmicity
Only cardiac muscle has a high concentration of mitochondria.
Question: Which chamber initially receives blood from the systemic circuit?
Choices:
left atrium
left ventricle
right atrium
right ventricle
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