A group of cells was treated with a proteolytic (protein-digesting) enzyme. Which of the following processes would be least affected by this treatment?
A. Diffusion of Na+ through membrane channels
B. Diffusion of lipid-soluble molecules through the plasma membrane
C. Use of carrier molecules in facilitated diffusion
D. Secondary active transport
E. Sodium-potassium exchange pump
Answer: B
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The term myogenic indicates that the heart muscle is the source of
A) receptors that trigger blood pressure reflexes. B) the contractile force for pumping. C) stem cells that repair damaged heart tissue. D) a hormone that indirectly regulates blood volume. E) the electrical signal that triggers heart contraction.
Which type of cell of the CNS is phagocytic?
A. Ependymal cells B. Satellite cells C. Oligodendrocytes D. Microglia
Umami taste sensation is elicited by ________
A) sugars B) acids C) amino acids glutamate and aspartate D) salt
When a person hits their "funny bone," they cause temporary damage to the ________ nerve.
A. radial B. axillary C. median D. musculocutaneous E. ulnar