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The two functional divisions of the peripheral nervous system are the afferent and efferent divisions. What are their respective functions? a. control of the central nervous system; control of the peripheral nervous system b. control of neurons; control of neuroglia c. sensory input to the CNS; carries motor commands to muscles or glands d. carries motor commands to muscles or glands; sensory input to the CNS © 2012 Pearson Education, Inc. Damage to somatic motor neurons of the efferent division of the PNS would affect the ability to: a. learn new facts. b. stimulate skeletal muscle. c. experience sensory stimuli. d. remember past events. © 2012 Pearson Education, Inc. The functional classification of neurons that are responsible for integrating sensory information with motor output are called ______. These neurons are located __________. a. motor neurons; in the anterior horn of the spinal cord b. proprioceptors; in skeletal muscles and joints c. interneurons; almost exclusively in the CNS d. interoceptors; in the digestive, respiratory, and cardiovascular systems © 2012 Pearson Education, Inc. Which of the CNS neuroglial cells function as phagocytic cells? a. satellite cells b. microglia c. oligodendrocytes d. astrocytes © 2012 Pearson Education, Inc. Which type of neuroglia would be found lining the hollow regions of the CNS? a. astrocytes b. microglia c. ependymal cells d. oligodendrocytes © 2012 Pearson Education, Inc. Which of these is NOT a site at which acetylcholine is released at a synapse? a. at neuromuscular junctions with skeletal muscles b. at ganglionic neuron-to-neuron synapses in the ANS c. sometimes at postganglionic synapses in the sympathetic division of the ANS d. none of the above © 2012 Pearson Education, Inc. The effects of a neurotransmitter on the postsynaptic membrane depend on: a. the time involved in calcium influx across the synapse. b. the rate of enzyme inhibition. c. the properties of the release of neurotransmitter. d. the type of receptor. © 2012 Pearson Education, Inc. Which structure of a neuron is capable of propagating an electrical impulse? a. dendrite b. axon c. cell body d. perikaryon © 2012 Pearson Education, Inc. Norepinephrine, dopamine, and serotonin are all members of which category of neurotransmitter? a. hormones b. biogenic amines c. amino acids d. neuropeptides © 2012 Pearson Education, Inc. A person you know has experienced sleep problems and prolonged depression. Which neurotransmitter may be in short supply? a. dopamine b. any of the opioids c. acetylcholine d. serotonin © 2012 Pearson Education, Inc. One axon propagates action potentials at 50 meters per second; another carries them at 1 meter per second. Which axon is myelinated? a. axon that propagates at 50 meters per second b. axon that propagates at 1 meter per second © 2012 Pearson Education, Inc. Which of the following statements is (are) true with regard to saltatory propagation? a. Myelinated areas of the axon increase propagation. b. Only nodes along a myelinated axon can respond to a depolarizing stimulus. c. Continuous propagation uses less energy, and fewer sodium ions must be pumped out. d. A and B are correct. © 2012 Pearson Education, Inc.