Exam2_explained - PSL 431 Second Hourly Exam Nov 6 2006...

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Unformatted text preview: PSL 431 Second Hourly Exam Nov. 6, 2006 Form A NAME___________________________________________ Q#, Forms A, B, C 1, 14, 5 Which of the following is NOT innervated by the autonomic nervous system? a. blood vessels in skeletal muscle b. blood vessels in the external genital organs c. blood vessels in the skin d. sweat glands in the skin of the arms, torso, and legs e. adipose tissue (fat cells) @ Comment : Fat cells do have adrenergic receptors, but they are not innervated (see the table of adrenergic and cholinergic effects supplied with the exam, also Nervous System Lecture #6, page 10). 2, 15, 13 Which of the following correctly describes a nociceptive afferent neuron? a. Its cell body is in the skin and its central axon terminals are in the dorsal horn of the spinal cord. b. Its cell body is in the skin and its central axon terminals are in the dorsal root ganglion. c. Its cell body is in the dorsal root ganglion and its central axon terminals are in the dorsal horn of the spinal cord. @ d. Its cell body is in the dorsal horn of the spinal cord and its central axon terminals are in the thalamus. e. Its cell body is in the dorsal horn of the spinal cord and its central axon terminals are in the ventral horn of the spinal cord. Comment : The anatomy of a nociceptive afferent neuron was introduced and diagrammed in Nervous System Lecture #1, page 11, and then repeated several times during subsequent lectures. 3, 16, 6 Which of the following generalizations about the autonomic nervous system is most clearly true? a. The sympathetic nervous system is usually activated as a unit ("mass discharge"). b. All autonomic effector tissues receive dual, reciprocal innervation. c. Sympathetic activation is harmful for the body. d. Autonomic effector tissues typically have an intrinsic, spontaneous activity (in the absence of autonomic nerve activity). @ e. The effect of parasympathetic innervation is to decrease (inhibit) the activity of effector tissues. Comment : The answer expresses the first of the "Three key features of autonomic function" in Nervous System Lecture #6, page 7....
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Exam2_explained - PSL 431 Second Hourly Exam Nov 6 2006...

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