Which is a correct description of hormone action?
A. FSH stimulates Leydig cells in the testes.
B. LH stimulates Sertoli cells in the testes.
C. Testosterone stimulates corpus luteum.
D. GnRH stimulates the anterior pituitary gland.
E. Testosterone regulates LH and FSH in a positive feedback loop.
D. GnRH stimulates the anterior pituitary gland.
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. A network of protein filaments called ____ lines and reinforces the inner surface of the nuclear
envelope in animal cells.
a. actins b. chromatins c. lamins d. tubulins e. lamellae
What two gases have a profound effect on the type of organisms that can live in an area and influences the regions carrying capacity?
a. Carbon dioxide and nitrogen b. Carbon dioxide and bicarbonate c. Oxygen and carbon dioxide d. Oxygen and nitrogen
The functional unit of the kidney is called
A. Bowman's capsule. B. a collecting duct. C. a nephron. D. a loop of Henle.
Color-blindness is inherited as an X-linked recessive trait. A male who is color-blind marries a heterozygous woman. What percent of their total children will be color-blind?
a) 0% b) 100% c) 25% d) 50% e) 75%