When a person is exposed to a cold environment:
A. sweat is produced and is warmed when the vessels constrict.
B. blood vessels dilate and divert blood to the core of the body.
C. the skin becomes flushed secondary to peripheral vasodilation.
D. peripheral vessels constrict and divert blood away from the skin.
Answer: D. peripheral vessels constrict and divert blood away from the skin.
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Unlike a cerebral concussion, a cerebral contusion is:
A) typically not associated with retrograde amnesia or focal neurologic deficits. B) a type of diffuse axonal injury that often leads to permanent neurologic damage. C) a diffuse brain injury that results in severe intracranial hemorrhage and pressure. D) associated with physical brain damage and more pronounced neurologic deficits.
Channel proteins
A. allow cells to recognize one another. B. are binding sites for other molecules. C. utilize the G protein complex to function. D. are found only on endoplasmic reticulum. E. provide a tunnel through which ions or molecules can enter or leave the cell.
The vitamin that is part of the coenzyme FAD is
A) thiamine. B) riboflavin. C) niacin. D) folic acid (folate). E) cobalamin.
The reaction HCl ? H+ + Cl- is what type of reaction?
A) decomposition B) exchange C) hydrolysis D) synthesis E) reversible