CD Questions-Nervous System I, Ch.9

CD Questions-Nervous System I, Ch.9 - Study Questions on...

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Study Questions on Anatomy Review: 5. (Page 5.) Label the dendrites, cell bodies, and axons of this neuron: 6. (Page 5.) Tell if the following are characteristic of dendrites, cell bodies, and/or axons: a. Receptive and integrative region of the neuron. b. Receives signals from other cells and sends them toward the axon. c. Sum up, or integrate, the incoming signals. d. generates an action potential e. The main nutritional and metabolic region of the neuron. f. The transmitting or conductive region of the neuron. 7. (Page 6.) What are outgoing signals on neurons called? 8. (Page 6.) On what part of the neuron are action potentials conducted? In which direction do they go? 10. (Page 7.) What are the junctions between neurons called? 20. (Page 10.) What terms are used to describe the following: a. The insulating material that some axons are covered with. b. support cells in the peripheral nervous system which produce myelin. c. The process of the formation of myelin sheath. 21. (Page 10.) What is the myelin sheath made of in the peripheral nervous system? 23. (Page 11.) What are the gaps in the myelin sheath called? Study Questions on Ion Channels: 1. (Page 3.) What controls the movement of ions across the membrane of a neuron? 2. (Page 3.) What are four properties of ion channels? 3. (Page 3.) What are ion channels made of? 5. (Page 4.) What three factors determine the selectivity of an ion channel? 7. (Page 6.) Is a resting neuronal cell membrane more positive inside or outside?
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8. (Page 6.) What is the result of the charge separation in a resting neuronal membrane? 9. (Page 6.) When the neuronal membrane is at rest are the voltage-gated channels opened or closed? 10. (Page 6.) What happens to the voltage-gated channels when there is a nerve impulse (or action potential) in the neuronal membrane? 11. (Page 6.) Why, when the Na + voltage-gated channel opens, does the membrane potential goes from -70 mV to less negative values. 12. (Page 6.) Why, when the K + voltage-gated channel opens, does the membrane potential goes from +30 mV to more negative values (-70). 13. (Page 7.) Give two general types of gated channels. 14. (Page 7.) What will open a chemically-gated ion channel in a neuron? 15. (Page 7.) When a neurotransmitter opens a chemically-gated channel, does the neurotransmitter go into the cell? 18. (Page 7.) What determines the direction that ions move through an ion channel? 19. (Page 8.) On what parts of the neuron do we find nongated channels?
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CD Questions-Nervous System I, Ch.9 - Study Questions on...

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