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 A
Explanation
Choice A rationale:
Diffusion is the primary mechanism for capillary exchange. It allows small molecules, such as gases, lipids, and lipid-soluble molecules, to move directly through the membranes of the endothelial cells of the capillary wall.
Choice B rationale:
Filtration is a pressure-driven mechanism that moves volumes of fluid from an area of higher pressure in a capillary bed to an area of lower pressure in the tissues. However, it is not the primary mechanism for capillary exchange.
Choice C rationale:
Gravity does not play a direct role in capillary exchange.
Choice D rationale:
Colloid osmotic pressure is a type of pressure that interacts with hydrostatic pressure to drive fluid movement in capillaries. However, it is not the primary mechanism for capillary exchange.
Correct Answer is B
Explanation
Choice A rationale:
While an LH surge does trigger ovulation, it is not the anatomical event of ovulation.
Choice B rationale:
Ovulation is the event when the Graafian follicle ruptures and releases an ovum.
Choice C rationale:
Blood menstrual flow is part of menstruation, which occurs after ovulation if the ovum is not fertilized.
Choice D rationale:
Crampy abdominal pelvic pain can occur with ovulation, but it is not the anatomical event of ovulation.
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