The trophoblast of the blastocyst is destined to become the
a. fetus
b. chorion
c. inner cell mass
d. amniotic sac
e. corpus luteum
B
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Under normal circumstances, the factors responsible for making delicate adjustments to the heart rate as circulatory demands change are __________.
a. nerve activity and muscular activity b. cardiac output and stroke volume c. autonomic activity and circulatory hormones d. all of the listed factors
What part of a feedback loop causes physiological responses to return the variable to the normal homeostatic range?
A) effector B) stimulus C) receptor (sensor) D) control center
Hepatic Kupffer cells:
a. Degrade bilirubin b. Have round, euchromatic nuclei and a cuboidal-shaped cytoplasm c. Phagocytize dying red blood cells d. Store vitamin A e. Synthesize angiotensinogen
The process of lactation (milk production) depends on both merocrine and ________ secretion by mammary gland epithelial cells
A) epicrine B) eccrine C) holocrine D) apocrine E) endocrine