Olfactory receptors are neurons.
Answer the following statement true (T) or false (F)
True
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Smokers are more susceptible to respiratory infections because
A. they congregate in small areas to smoke. B. the respiratory passages have too little mucus. C. their respiratory passages lose cilia, which would otherwise remove bacteria. D. their respiratory passages overproduce cilia, to which bacteria cling.
Although local blood flow to different organs varies from time to time (based on demand), the distribution of blood vessels in the various organs of the body is fairly similar
Indicate whether this statement is true or false.
________ cells form myelin sheaths in the PNS.
Fill in the blank(s) with the appropriate word(s).
Activation of sympathetic nerves that innervate lung tissue results in
A. bronchoconstriction. B. bronchodilation.