Excitable cells respond to outside stimuli by means of changes in plasma membrane shape.
Answer the following statement true (T) or false (F)
False
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The tightly coiled tube that lies along the top and sides of the testes is the:
a. epididymis b. ductus deferens c. ejaculatory duct d. urethra
Which of the following statements concerning water reabsorption is correct?
a. water reabsorption is under control of vasopressin throughout the length of the nephron. b. the ascending limb of the loop of Henle is always impermeable to water. c. vasopressin makes the distal and collecting tubules impermeable to water. d. fifteen percent of the filtered water osmotically follows the absorption of Na+ and other solutes in the proximal tubule. e. water reabsorption is passive in the early portions of the nephron but is active in the distal portions of the nephron.
Which of the following is NOT correctly paired?
a. distal tubule and intercalated cells b. Type A intercalated cells and H+ secretion c. Type A intercalated cells and HCO3- reabsorption d. proximal tubule and H+ secretion e. fish gills and H+ ATPase pumps
Which of the following is true concerning isotonic eccentric contraction?
A. The muscle tenses and shortens. B. The muscle shortens, but tension remains constant. C. The muscle lengthens, but tension remains constant. D. The muscle lengthens, and tension declines. E. The muscle tenses, but length remains unchanged.