CCT - Practice Test Questions & 100% Correct Answers
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Course
CCC NURS275
Institution
CCC NURS275
Which heart chamber functions to pump deoxygenated blood to the
lungs?
a. Right atrium
b. Right ventricle
c. Left atrium
d. Left ventricle
~~> 1. B: The right ventricle pumps the deoxygenated blood it has
received from the right atrium to the lungs. The right atrium pumps
deoxygenate...
✓ ~~> 5. B: The calibration mark representing the sensitivity of the ECG
should be 10 mm in height (two large squares). This mark is usually
found on the left side of the page at the beginning of each line of the
ECG. When this is set correctly it means that for every millivolt measured
from the patient, a deflection of 10 mm will be recorded on the trace.
6. Which of the following is the mechanism of action of nitrates?
a. Decrease the responsiveness of heart to the sympathetic nervous system
b. Lower the heart rate
c. Decrease cardiac contractility
d. Dilation of coronary arteries
✓ ~~> 6. D: Nitrates are useful for the prevention and treatment of
angina. They work by dilating the coronary arteries and thus increasing
the blood flow to the heart. They dilate peripheral veins, and, in higher
doses, other peripheral arteries, which decreases preload and
afterload. Beta-blockers decrease the responsiveness of the heart to
the sympathetic nervous system. Calcium channel blockers, beta-
blockers, and other medications decrease cardiac contractility and
decrease heart rate.
Master01 | September, 2024/2025 | Latest update
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