reviewcnsgn - REVIEW THE NERVOUS SYSTEM THE NERVOUS SYSTEM...

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REVIEW THE NERVOUS SYSTEM THE NERVOUS SYSTEM NOTES ____1. The brain and the spinal cord are the a. peripheral nervous system c. central nervous system b. sympathetic nervous system d. parasympathetic nervous system ____2. What is the basic functional unit of the nervous system? a. cell body b. reflex arc c. neuron d. neutron ____3. Which of the following is true? a. Dendrites carry information toward the cell body. c. Axons carry information toward the cell body. b. Dendrites carry information away from the cell body. d. None of the above ____4. Neurons carry information through the body in the form of a. nerve impulses. b. dendrites. c. axons. d. nerve fibers. ____5. Which neurons conduct information toward the central nervous system? a. sensory neurons b. motor neurons c. interneurons d. none of the above ____6. Neurons with myelin sheath conduct nerve impulses a. faster than neurons without myelin sheaths. c. slower than neurons without myelin sheaths. b. at the same speed as neurons without myelin sheaths. d. in greater numbers than neurons without myelin sheaths.
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____7. Messages take the form of electrical signals, and are known as a. sensory neurons b. nerve impulses c. motor neurons d. reflex arc ____8. The depolarization and repolarization of a neuron membrane is called a. action potential b. resting potential c. excitability d. propagation ____9. What are the spaces between adjacent neurons called? a. reflex arc b. effector c. synaptic cleft d. resting potential ____10. What is the function of neurotransmitters? a. hurl neurons through synapses to create new nerve impulses b. chemically link neurons across the synapse to conduct impulses c. receive and transmit ultrasound waves across synapses d. none of the above ____11. For a neuron to return to its resting potential, it must a. lose negative charge b. lose positive charge c. gain negative charge d. gain more sodium ions ____12. A change in the environment that may be of sufficient strength to initiate an impulse is called a(an) a. excitability b. stimulus c. polarized d. potential ____13. When a neuron is depolarized, the inside of the membrane temporarily becomes a. more negative than the outside c. more positive than the outside b. neutral compared to the outside. d. None of the above ____14. The minimum level of a stimulus that is required to activate a neuron is called the a. action potential b. threshold c. resting potential d. enzymes ____15. The long fiber that carries impulses away from the nerve cell body is a (n) a. dendrite b. interneuron c. axon d. axon terminal ____16. The action that restores a neuron to its resting potential is a. polarization b. action potential c. depolarization d. refractory period
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reviewcnsgn - REVIEW THE NERVOUS SYSTEM THE NERVOUS SYSTEM...

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