Cardiology MCQ
Alternative routes of blood supply are called __________.
Answer
Correct Answer:
Anastomoses
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A block at the av node is likely to appear as a(n) ___________________ on an ecg.
Answer
Correct Answer:
Prolonged PR intervals
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Electrical stimulation of the ________ is reinforcing to rats.
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Correct Answer:
Ventral tegmental area
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Electrical stimulation of a rat's lateral hypothalamus would most likely result in ____.
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Correct Answer:
An increase in food seeking behaviors
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Electrical stimulation as a method of mapping the cerebral cortex was introduced by ____.
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Correct Answer:
Fritsch and Hitzig.
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Electrical signals pass between cardiomyocytes through the _____.
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Correct Answer:
Gap junctions
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Excessive vagal stimulation of the heart will result in _______.
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Correct Answer:
A decrease in heart rate and, eventually, a temporary cessation of the heartbeat
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After entering the right atrium, the furthest a red blood cell can travel is the _________.
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Correct Answer:
Superior vena cava
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The one-way nature of the left av valve prevents blood flow from _________.
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Correct Answer:
The left ventricle to the left atrium
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Aortic valve stenosis is characterized by _______.
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Correct Answer:
Increased resistance to blood flow, thickening of the myocardium and narrowing of the aortic semilunar valve
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H f _____.
Answer
Correct Answer:
Heart failure
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The closing of the left av valve occurs near the beginning of __________.
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Correct Answer:
Ventricular systole
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Hypertension increases ________ causing stroke volume to ________.
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Correct Answer:
Afterload; decrease
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Atrial systole begins __________.
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Correct Answer:
Immediately after the P wave
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Electrodes for limb leads should be attached to ____.
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Correct Answer:
Fleshy portions of the limbs
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Beginning around age 25, the maximum heart rate _____ and the resting heart rate _____.
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Correct Answer:
Decreases; remains same
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cardioinhibitory centers in the __________ receive input from __________.
Answer
Correct Answer:
Medulla oblongata; chemoreceptors in the aortic arch
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