CHICE Choose the one alternative that best completes the statement or answers th

Question

CHICE Choose the one alternative that best completes the statement or answers the question. 1) Which of the following is an excitatory neurotransmitter secreted by motor neurons innervating 1 skeletal muscle? A) gamma aminobutyric acid C) acetylcholine B) cholinesterase D) norepinephrine 2) Which of the following is not characteristic of neurons? 2) A) They conduct impulses B) They are mitotic. C) They have extreme longevity D) They have an exceptionally high metabolic rate. 3) The part of a neuron that conducts impulses away from its cell body is called a(n) 3) A) neurolemma B) axon C) Schwann cell D) dendrite 4) Which ion channel opens in response to a change in membrane potential and participates in the4 generation and conduction of action potentials? A) ligand-gated channel C) mechanically gated channel B) voltage-gated channel D) leakage channel 5) An impulse from one nerve cell is communicated to another nerve cell via the A) synapse B) effector C) receptor D) cell body 6) What is the role of acetylcholinesterase? A) destroy ACh a brief period after its release by the axon endings B) act as a transmitting agent C) amplify or enhance the effect of ACh D) stimulate the production of acetylcholine 7) Collections of nerve cell bodies outside the central nervous system are called A) nuclei B) nerves C) tracts D) ganglia 8) The substance released at axon terminals to propagate a nervous impulse is called a(n) A) neurotransmitter C) ion B) biogenic amine D) cholinesterase 9) Schwann cells are functionally similar to A) astrocytes C) oligodendrocytes B) ependymal cells D) microglia 0) In what way does the interior surface of a cell membrane of a resting (nonconducting) neuron diffe from the external environment? The interior is A) positively charged and contains less sodium B) negatively charged and contains more sodium C) negatively charged and contains less sodium D) positively charged and contains more sodium

Explanation / Answer

Answers

1.C) Acetylcholine

2.B) They are mitotic

3.B) Axon

4.B) Voltage-gated channel

5.A) Synapse

6. A) Destroy Ach a brief period after its release by the axon endings

7.D) Ganglia

8.A) Neurotransmitter

9.A) Astrocytes

10.C) Negatively charged and contains less sodium.

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