A&P Exam 4 Kasparian Questions With 100% Correct Answers!!

Which of the following is not a function of astrocytes? - Answer-provide the defense for the CNS Which of the choices below describes the ANS? - Answer-motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands What are ciliated CNS neuroglia that play an active role in moving the cerebrospinal fluid called? - Answer-ependymal cells The sheath of Schwann is also called the ________. - Answer-neurilemma Bipolar neurons are commonly ________. - Answer-found in the retina of the eye Which of the following is an excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle? - Answer-acetylcholine Which of the following describes the nervous system integrative function? - Answer-analyzes sensory information, stores information, makes decisions The period after an initial stimulus when a neuron is not sensitive to another stimulus is the ________. - Answer-absolute refractory period Which of the following is not a special characteristic of neurons? - Answer-They are mitotic The part of a neuron that conducts impulses away from its cell body is called a(n) ________. - Answeraxon 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 channelAn impulse from one nerve cell is communicated to another nerve cell via the ________. - Answervoltage-gated channel What is the role of acetylcholinesterase? - Answer-destroy ACh a brief period after its release by the axon endings Which of the following is not a function of the autonomic nervous system? - Answer-innervation of skeletal muscle Collections of nerve cell bodies outside the central nervous system are called ________. - Answer-ganglia The term central nervous system refers to the ________. - Answer-brain and spinal cord The substance released at axon terminals to propagate a nervous impulse is called a(n) ________. - Answer-neurotransmitter A neuron that has as its primary function the job of connecting other neurons is called a(n) ________. - Answer-association neuron Saltatory conduction is made possible by ________. - Answer-the myelin sheath Which of the following is not a chemical class of neurotransmitters? - Answer-nucleic acid Which of the following is false or incorrect? - Answer-A nerve impulse occurs if the excitatory and inhibitory effects are equal. Select the correct statement regarding synapses. - Answer-The synaptic cleft prevents an impulse from being transmitted directly from one neuron to another. Ependymal cells ________. - Answer-help to circulate the cerebrospinal fluidNeuroglia that control the chemical environment around neurons by buffering potassium and recapturing neurotransmitters are ________. - Answer-astrocytes