ACh regulates neuromuscular junction through (i)______________, which is expressed in skeletal muscle. (ii)_________ is an (iii)_________ of the receptor.
a) (i) ACh nicotinic receptor, (ii) nicotine, (iii) agonist
b) (i) ACh muscarinic receptor, (ii) nicotine, (iii) agonist
c) (i) ACh nicotinic receptor, (ii) muscarine, (iii) antagonist
d) (i) ACh muscarinic receptor, (ii) muscarine, (iii) antagonist
Answer: a) (i) ACh nicotinic receptor, (ii) nicotine, (iii) agonist
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Saturation can be defined as
A) denaturation of an enzyme. B) the inability to increase reaction velocity beyond a finite upper limit. C) inhibition of enzyme function by blocking the active site. D) the substrate concentration at which velocity reaches one-half maximum velocity. E) a characteristic of all uncatalyzed reactions.
The kinesin ATPase is located within the ________ of a nerve cell.
Fill in the blank(s) with the appropriate word(s).
Which of the following was a biological fact important to the development of Darwin's ideas about evolution?
A. Organisms typically produce huge numbers of offspring. B. There are differences among members of the same species. C. There is a high death rate among organisms. D. All of these are true.
Which structure does not represent a mode of vegetative reproduction?
A. stolons B. adventitious plantlets C. runners D. rhizomes E. suckers F. rhizoids