The ovaries secrete:
a. progesterone.
b. testosterone.
c. estrogen.
d. a and c.
d. a and c.
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Discuss the importance of countercurrent flow to the functioning of the nephron
What will be an ideal response
Under normal circumstances, aged and damaged erythrocytes are broken down by the
A) kidneys. B) thymus gland. C) spleen. D) digestive tract. E) yellow bone marrow.
"Glucose is transported from blood into cells by transporters in response to insulin." This type of explanation is
A) teleological. B) theological. C) metalogical. D) mechanistic. E) scatological.
The function of a tight junction within epithelial tissue is to
A. assure that material is captured by phagocytes before entering a cell. B. assure that material is channeled between cells rather than into them. C. prevent the dissolution of a cell's plasma membrane. D. assure that material has to pass through rather than between epithelial cells. E. channel substances away from an epithelium rather than toward it.