The membrane potential (resting potential) is largely set by the Na-K-ATpase pump.
a. true
b. false
Ans: a. true
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In a growing population, the youngest age classes have
A. the highest number of deaths/year. B. the fewest individuals. C. the most individuals. D. the smallest number of deaths/year. E. the most individuals and the largest number of deaths/year.
T cells will begin to secrete cytokines when bound to a(n) ____
a. MHC-antigen complex b. receptor-antigen complex c. antigen directly bound to the surface of a transport vesicle d. antigen-antibody complex e. bacterial pathogen
A partial diploid E. coli cell of lacI+lacP+lacOc lacZ-lacY-/ lacI- lacP+ lacO+lacZ-lacY+ genotype will synthesize:
A. lacZ but not lacY gene product in the presence of lactose. B. lacY but not lacZ gene product in the presence of lactose. C. lacY but not lacZ gene product in the absence of lactose. D. neither lacZ nor lacY gene products in the presence of lactose. E. both lacZ and lacY gene products in the absence of lactose.
Which of the following is not a type of joint?
A. cartilaginous B. suture C. fibrous D. trochanter E. synovial