Veins are called capacitance vessels because:.
They convey blood back to the heart.
They can stretch.
They contain one-way valves.
They can constrict extensively.
The Correct Answer is B
Choice A rationale:
While veins do convey blood back to the heart, this is not the reason they are called capacitance vessels.
Choice B rationale:
Veins are referred to as capacitance vessels because they can stretch and contain about 60% of the body’s blood volume.
Choice C rationale:
Although veins contain one-way valves, this characteristic does not define them as capacitance vessels.
Choice D rationale:
Veins can constrict, but this is not the primary reason they are known as capacitance vessels.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
Innate immunity is not an acquired immunity. Acquired immunity refers to immunity that develops after exposure to a specific pathogen.
Choice B rationale:
Innate immunity does not retain a memory of a pathogen after defeating it. This is a characteristic of adaptive immunity.
Choice C rationale:
Innate immunity does not offer protection against a particular pathogen. It provides a general defense against a wide range of invaders.
Choice D rationale:
Innate immunity is present at birth. It provides a fast response that involves first- and second-line defenses.
Correct Answer is C
Explanation
Choice A rationale:
The build-up of plaque in the arteries is a specific type of arteriosclerosis known as atherosclerosis.
Choice B rationale:
Aging of the arteries is not a precise definition of arteriosclerosis.
Choice C rationale:
Arteriosclerosis is characterized by the abnormal thickening, hardening, and loss of elasticity of the arteries.
Choice D rationale:
Stretching of the arteries is not a characteristic of arteriosclerosis.
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