Which of the following substances found in sustentacular cells may be the active hormones that promote sperm cell formation?
A. IgA and IgG
B. sustentaculum and gubernaculum
C. dihydrotestosterone and estrogen
D. androgen-binding protein and testosterone
E. estrogen and progesterone
C
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A dilution is a increased strength of a disinfectant so that it kills all living organisms
Indicate whether the statement is true or false
The thoracic cage consists of the
A. coxal bones and sacrum. B. scapulae and clavicles. C. ribs. D. coxal bones. E. ribs and sternum.
Which fibers are primarily responsible for producing lactate?
A. Type IIB fast fibers B. Slow fibers C. Type IIA fast fibers D. Red fibers E. Type I slow-twitch fibers
Which of the following is clinically significant as an ectopic pacemaker of the heart?
a. drinking several cups of caffeinated coffee b. extrasystole contractions associated with angina pectoris c. excessive smoking d. anxiety