A menstrual flow results from _____
a. implantation of a fertilized in the endometrium
b. a drop in progesterone and estrogen levels
c. the release of gonadotropin-releasing hormone by the hypothalamus
d. the production of prostaglandins by the uterus
e. the release of progesterone and estrogen by the corpus luteum
b
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Milk curdles when lemon juice is added to it. The change that occurs in the protein is called
A. denaturation. B. translocation. C. transcription. D. deamination.
Which of the following foods provides the most cholesterol in a single 3-ounce serving?
a. Peanut butter b. Milk c. Avocado d. Bagel
Ethylene gas
a. may allow the fruits to deteriorate more quickly. b. slows down the ripening process. c. reduces respiration. d. all of the above answers are correct
Intrinsic factor is produced by the
A. parietal cells of the stomach. B. beta-cells of the pancreas. C. salivary glands. D. enterocytes of the small intestine.