All of the following are characteristics of the pituitary gland except
A. located superior to the hypothalamus.
B. secretes several major hormones.
C. rests in the sphenoid bone.
D. is regulated by the hypothalamus.
E. influences the secretion of other endocrine glands.
Answer: A
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Lactose intolerance is caused by the lack of the enzyme lactase, which is normally found in the
A. lumen of the stomach. B. membranes of cells in the small intestine. C. endothelium of capillaries in the large intestine. D. inside of cells in the large intestine. E. inside of cells of the liver and gall bladder.
Hydrochloric acid is a:
A) hydrogen ion acceptor. B) proton acceptor. C) hydrogen ion donor. D) hydroxide ion donor.
Describe hypersensitivities
A) Hypersensitivities are normal immune responses to an allergen, which is an antigen that triggers an allergic reaction. B) Hypersensitivities are excessive immune responses to an allergen, which is an antigen that triggers an allergic reaction. C) Hypersensitivities is a condition that results from the production of antibodies directed against normal antigens in the body. D) Hypersensitivities are inadequate immune responses due to problems with embryonic development of lymphoid organs and tissues, a viral infection, or treatment with or exposure to immunosuppressive agents. E) Hypersensitivities are the excessive immune reaction of antibodies to a virus-infected cell.
How is autocrine regulation best described?
A. Chemical regulators are released directly into blood vessels. B. Chemical regulators released by cells affect the functional status of different kinds of cells in the vicinity of the secretory cell. C. Chemical regulators affect the same cells that produce them. D. Chemical regulators reach their site of action through a duct. E. Chemical regulators are continuously released in constant amounts by the cell.