What is vasodilation?
Compression of a vein because of muscle contraction.
An increase in the diameter of a blood vessel.
Contraction of the ventricles which increases ventricular pressure.
A decrease in the diameter of a blood vessel.
The Correct Answer is B
A. Compression of a vein because of muscle contraction: That’s mechanical venous compression (skeletal muscle pump), not vasodilation.
B. An increase in the diameter of a blood vessel: Definition of vasodilation.
C. Contraction of the ventricles which increases ventricular pressure: That describes ventricular systole, not vasodilation.
D. A decrease in the diameter of a blood vessel: That is vasoconstriction, the opposite of vasodilation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Tunica media: Middle layer made of smooth muscle and elastic fibers; not the innermost layer.
B. Tunica externa: Outermost connective-tissue layer (adventitia) that contains collagen and sometimes vasa vasorum; not the innermost.
C. Endothelium: The simple squamous cell lining that forms the innermost surface (part of the tunica intima).
D. Vasa vasorum: Small blood vessels that supply the walls of large vessels, located in the outer layers; not the innermost.
Correct Answer is {"dropdown-group-1":"A"}
Explanation
Correct answer: Tricuspid valve
The X marks the tricuspid valve, the atrioventricular valve between the right atrium and right ventricle composed of three cusps.
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