Glucagon raises blood glucose levels by:
a. stimulating the liver to take up glucose.
b. inhibiting gluconeogenesis.
c. stimulating gluconeogenesis.
d. inhibiting fatty acid mobilization.
e. inhibiting amino acid mobilization
c
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The nonselective movement of water and a number of solutes into excretory system tubules is called --____
a. reabsorption b. excretion c. filtration d. secretion e. diffusion
The "background" species extinction rate
A. estimates how many extinctions humans are causing. B. estimates how quickly species disappeared before human intervention. C. measures today's extinction rate of animals. D. measures today's extinction rate of plants. E. All of the answer choices are correct.
Which of the following provides evidence for the signal hypothesis for the targeting of a secretory protein to the rough ER?
a. The protein is larger when synthesized in vitro on free polysomes. b. The secretory protein ends up in the cytosol when a short sequence is deleted by genetic engineering. c. A normally cytosolic protein is secreted when a specific sequence is added to it by genetic engineering. d. All of the above
True or False: Common-source infectious diseases are caused by microbial contamination of materials shared by a small number of individuals
a. TRUE b. FALSE