The autonomic nervous system can be subdivided into which types of adrenergic receptors?
a. Nicotinic and muscarinic
b. Afferent and efferent
c. Alpha and beta
d. Agonists and antagonists
ANS: C
The autonomic nervous system can be subdivided into alpha- and beta-adrenergic receptors. Nicotine and muscarine are specific agonists of one type of cholinergic receptor. Afferent and efferent are sensory and motor nerves. An agonist is a molecule that activates a receptor by reproducing the effect of the neurotransmitter. An antagonist acts against and blocks a function.
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