Chapter 05: Central and Peripheral Nervous Systems

Chapter 05: Central and Peripheral Nervous Systems

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE

1. The somatic portion of the nervous system controls which of the following?

ANS:  C

Heart muscle is under autonomic control. Glandular secretion and smooth airway muscle are controlled by the autonomic nervous system. Skeletal muscle (used for such motor actions as lifting, walking, and breathing) is under conscious control by the somatic portion of the nervous system.

REF:   p. 78

2. How is the neurotransmitter acetylcholine inactivated at the parasympathetic terminal receptor site?

ANS:  C

The enzymes COMT and MAO inactivate catecholamines such as epinephrine. The reuptake process terminates norepinephrine and sympathetic transmission. Cholinesterase inactivates the neurotransmitter acetylcholine at the parasympathetic terminal receptor site.

REF:   p. 77 | p. 80

3. You administer an inhaled bronchodilator that is known to have adrenergic side effects. What cardiovascular clinical effect should you watch for in your patient?

ANS:  B

The adrenergic effect on the heart is excitatory, leading to an increase in heart rate. The muscles of respiration are under somatic control.

REF:   p. 86

4. Following administration of a dose of atropine to your patient, which of the following effects are not likely to occur?

ANS:  C

As a parasympatholytic agent, atropine blocks salivary secretion and causes dry mouth. Atropine also blocks the parasympathetically maintained basal tone of bronchial smooth muscle and would produce an expected relaxation of bronchial smooth muscle. Atropine has a parasympatholytic effect on the mucous glands, decreasing mucus production, and blocks vagal innervation of the heart to produce an increased heart rate.

REF:   p. 82