If a secondary oocyte is fertilized and successfully implants in the uterine lining, it becomes a pre-embryo and begins to secrete
A. estrogen.
B. gonadotropin-inhibiting hormone.
C. human chorionic gonadotropin.
D. gonadotropin-releasing hormone.
E. progesterone.
Answer: C
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Lactose intolerance is caused by
a. lack of a specific disaccharidase b. lack of lactose c. bacterial metabolism of lactose d. a and b e. a and c
Wolff's law is concerned with ________.
the diameter of the bone being dependent on the ratio of osteoblasts to osteoclasts vertical growth of bones being dependent on age the function of bone being dependent on shape the thickness and shape of a bone being dependent on stresses placed upon it
The long tail-like structure that propels sperm cells is the:
a. endoplasmic reticulum b. cilia c. Golgi apparatus d. flagella
The ascending limb of the loop of Henle
a. actively transports NaCl into the surrounding interstitial fluid. b. is impermeable to water. c. is found in the renal cortex. d. drains into the proximal convoluted tubule. e. both (a) and (b) above.