Most preganglionic fibers in the sympathetic nervous system synapse with ________
A) no neurons
B) somatic neurons
C) effectors directly
D) 10-20 postganglionic neurons
E) parasympathetic neurons
D
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Changes in the respiratory system that accompany aging include
A. overactive cilia, causing frequent coughing. B. thickening of the alveolar walls. C. thinning mucus. D. slowed swallowing reflex.
Low ________ means that it is more difficult to expand the lungs.
A. potential B. impression C. compliance D. gradient
Which of the following is found in breast milk?
a. Lymphocytes b. A substance that decreases the availability of iron c. A substance that promotes the growth of certain microorganisms d. All of the above e. None of the above
Which of the following is a barrier to proper nutrition?
A) Decreased saliva B) Tooth loss C) Difficulty swallowing D) All of the above