Which of the following statements is false?
A. Water evaporation cools the body.
B. Water serves as an effective lubricant in our bodies.
C. Water transports nutrients in the body.
D. Water allows the body to resist sudden temperature changes.
E. Water evaporation heats the body.
Answer: E
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At a typical filtration pressure of 10 mmHg, the average individual filters about ____ of the plasma that enters the glomerulus
a. 10% b. 15% c. 20% d. 25% e. 30% delete line->
Na+ reabsorption of sodium in the kidney plays a role in
a. amino acid reabsorption. b. water reabsorption. c. regulation of ECF osmolality. d. secretion of K+ . e. all of these.
Increased renin secretion is NOT due to
a. granular cell activation. b. a pressure drop in the afferent arteriole. c. an increase in sympathetic nervous system activity. d. an increase in ECF volume. e. a drop in blood pressure.
Which of the following statements concerning myelination is true?
A. Unmyelinated axons rest in invaginations of Schwann cells or oligodendrocytes. B. The myelin sheath inhibits the flow of electrical charges at nodes. C. Myelination will not influence the speed of conduction of action potentials. D. The myelin sheath does not electrically insulate the axons from one another. E. The myelin sheath is a protein wrapping.