Test #4 - Page1...

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Page 1 1) Which of the following is NOT a function of astrocytes? A. can take up NT from a synapse B. can stimulate or inhibit neurons C. needed to form synapses in the CNS D. phagocytose foreign material in the CNS E. forms the blood-brain barrier 2) Which of the choices below best describes the ANS.      A) Sensory and motor neurons that supply the digestive tract  B) Motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands  C) Sensory neurons that convey information from somatic receptors in the head, body wall, and limbs and  from receptors from the special senses of vision, hearing, taste, and smell to the CNS D) Motor fibers that conduct nerve impulses from the CNS to skeletal muscles 3) Ciliated CNS neuroglia that play an active role in moving the cerebrospinal fluid are called ________. A) ependymal cells B) Schwann cells C) oligodendrocytes D) astrocytes 4)  The sheath of Schwann is also called the ________. A) myelin sheath B) axolemma C) neurilemma D) white matter 5) Bipolar neurons are commonly _______ A) motor neurons B) called neuroglial cells C) found in ganglia D) found in the retina of the eye 6) An excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle is ________. A) cholinesterase B) norepinephrine C) acetylcholine D) gamma aminobutyric acid 7) Which of the following describes the nervous system integrative function? Answer: analyze sensory information, store information, make decisions The nervous system processes and interprets sensory input and decides what should be done at each moment 8) The period after an initial stimulus when a neuron is not sensitive to another stimulus is the ________. A) resting period B) repolarization C) depolarization
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Page 2 D) refractory period
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9) Which of the following is not a special characteristic of a neuron? A) They are mitotic B) Nissl bodies C) dendrites D) axon 10) The part of a neuron that conducts impulses away from its cell body is called a(n) ________. A) axon B) dendrite C) neurolemma D) Schwann cell 11) Which ion channel opens in response to a change in membrane potential and participates in the generation and conduction of action potentials? Answer: voltage-gated channel 12) The point at which an impulse from one nerve cell is communicated to another nerve cell is the ________. A) cell body B) synapse C) receptor D) effector 13) The role of acetylcholinesterase is to ________. A) act as a transmitting agent B) amplify or enhance the effect of ACh C) destroy ACh a brief period after its release by the axonal endings D) stimulate the production of serotonin 14) Which of the following is not a function of the autonomic nervous system? A) innervation of smooth muscle of the digestive tract
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This note was uploaded on 07/10/2011 for the course BIO 2113 taught by Professor Gantt during the Spring '11 term at Chatt Tech.

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Test #4 - Page1...

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