Explain why a person whose intestinal lining cells continuously "leak" chloride ions into the intestinal lumen experiences dehydration
What will be an ideal response?
The change in tonicity of the lumen caused by the "leakage" of chloride ions causes the cells of the intestine to lose their water content, thus leading to dehydration.
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Which of the following is NOT true about phospholipids?
a) They contain a glycerol backbone. b) The head group is polar. c) The molecule is an important part of cell membranes. d) The tail groups are nonpolar. e) They are a major form of energy storage.
Is knowing the AB0 blood type of a potential blood donor enough to determine a suitable match?
A. Yes B. No
What color of light is best absorbed by rods?
A. Yellow B. Red C. Purple D. Blue-green
What would be the best explanation for why myelinated fibers conduct signals faster than unmyelinated fibers?
A. There are no internodes in unmyelinated fibers. B. Facilitated diffusion of sodium and potassium is faster in myelinated fibers. C. There are more internodes in unmyelinated fibers. D. Diffusion of ions along the axoplasm is faster. E. Active transport of sodium and potassium is faster in myelinated fibers.