Which layer of arteries and veins is made up of connective tissue and elastic fibers?
a. tunica intima
b. tunica media
c. tunica externa
d. lumen
c. tunica externa
Biology & Microbiology
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The direct role of LH in males is to
a. stimulate testosterone secretion. b. stimulate spermatogenesis. c. stimulate Sertoli cells. d. inhibit GnRH secretion. e. do all of these.
Biology & Microbiology
The ________ birthrate is expressed as the births per 1000 individuals per unit of time
Fill in the blank(s) with correct word
Biology & Microbiology
A temporary oxygen deficit during strenuous exercise causes a muscle to
A) synthesize muscle proteins in response to steroid hormone stimulation. B) synthesize glycogen. C) ferment pyruvate to lactate. D) switch to aerobic glycolysis. E) synthesize more NAD+.
Biology & Microbiology
Which group is the sister group to humans?
A. Earthworm B. Lizard C. Tuna D. Mouse E. Duck
Biology & Microbiology