Select the membrane molecule that is made up of a polar region with two nonpolar fatty acid tails.
A. transmembrane proteins
B. cell surface proteins
C. carbohydrate chains
D. phospholipids
Answer: D
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The type of hypersensitivity expressed with the lysing of red blood cells is
A. type I. B. type II. C. type III. D. type IV. E. type V.
When a cell loses telomerase activity, what is the predicted effect?
A) Telomeres will increase slightly with each cell division. B) After 30–50 divisions, the cell will show signs of senescence and then die. C) An immune stem cell will increase white blood cell production. D) A normal somatic cell will gain the ability to divide indefinitely. E) The cell will die immediately.
The organ of Corti rests on the
a. round window. b. oval window. c. Eustachian tube. d. auditory nerve. e. basilar membrane.
Thermal burns are MOST commonly caused by exposure to:
A) hot liquids. B) hot solid objects. C) an open flame. D) superheated steam.