Which is true of veins?.
Always carry deoxygenated blood.
Carry blood away from the heart.
Have thick tunica media.
Veins have valves.
The Correct Answer is D
Choice A rationale:
Veins do not always carry deoxygenated blood. The pulmonary veins are an exception as they carry oxygenated blood from the lungs to the heart.
Choice B rationale:
Veins do not carry blood away from the heart. They carry blood back toward the heart.
Choice C rationale:
Veins do not have a thick tunica media. The tunica media is thinner in veins than in arteries.
Choice D rationale:
Veins have valves. This is a true statement. The valves in veins prevent blood from flowing backward.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
While the spleen is the body’s largest lymphatic organ, this statement does not encompass all of its functions.
Choice B rationale:
The spleen does contribute to the production of white blood cells, but this is not its only function.
Choice C rationale:
The spleen does play a role in immunity, but it has other functions as well.
Choice D rationale:
This choice accurately describes the multiple functions of the spleen, including immunity, destruction of old red blood cells, blood storage, and hematopoiesis.
Correct Answer is B
Explanation
Choice A rationale:
The spleen does not produce interferon.
Choice B rationale:
The spleen screens passing blood for foreign antigens, which is part of its role in immune response.
Choice C rationale:
The spleen does not produce immunoglobulins.
Choice D rationale:
The spleen does not produce B and T lymphocytes.
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