Vasodilation causes:.
Decreased pressure and decreased flow.
Decreased pressure and increased flow.
Increased pressure and increased flow.
Increased pressure and decreased flow.
The Correct Answer is B
Choice A rationale:
Vasodilation increases the diameter of blood vessels, which decreases resistance and thus decreases pressure. However, the increased diameter allows for increased blood flow, not decreased.
Choice B rationale:
Vasodilation decreases pressure due to the increased diameter of the blood vessels, and it increases flow because of the reduced resistance to blood flow.
Choice C rationale:
Vasodilation does not increase pressure; it decreases it.
Choice D rationale:
While vasodilation decreases pressure, it does not decrease flow; it increases it.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
hoice A rationale:
Peyer’s patches are lymphoid nodules located in the small intestine, not at the back of the throat.
Choice B rationale:
Lymph is a fluid that contains white blood cells and circulates throughout the lymphatic system, not a tissue located at the back of the throat.
Choice C rationale:
Tonsils are lymphoid tissues located at the back of the throat. They help protect the body from respiratory infections.
Choice D rationale:
The appendix is not located at the back of the throat. It is a narrow pouch that projects off the cecum in the digestive system.
Correct Answer is D
Explanation
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.
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