Question

KEY TERMS March the numbered form with the definition that is it be definition the responding sumber in front of the appropriate 40. excitatory postsynaptic potential 21. resting potential 22 on leakage channels 23. equilibrium potential -24 graded potential 25. gated ion channels 26. depolarization 27. hyperpolarization Sensory neurons 2. central nervous system 3. motor neurons 4. intercurons 5. peripheral nervous system 6. somatic motor neurons *7. autonomic motor neurons 8. sympathetic 9. parasympathetic 10. cell body all dendrites 12. axons 13. neuroglia 14. Schwann cells 15. oligodendrocytes 16. myelin sheaths 17. white matter 18 gray matter 19. noves 20. nodes of Ranvier 29. action potential 30. threshold potential 31. voltage-gated ion channels 32. salutatory conduction -33. synapses 34. synaptic cleft 35. synaptic vesicles 36. neurotransmitters 37. presynaptic cell 38. postsynaptic cell 39. acetylcholine 41. Inhibitory postsynaptic potential 42. glutamate 43. glycine 44. dopamine 45. norepinephrine 46. scrotonin 47. neuropeptides 48. substance P 49. enkephalins 50. endorphins 51. nitric oxide 52. synaptic integration 53. dorsal root 54. ventral root 55. dorsal root ganglia A neurotransmitter that crosses the synapse between a motor neuron and a muscle fiber. b. 21A permeability change in a membrane that makes the membrane potential more negative c. 12 A process extending out from a neuron that conducts impulses away form the cell body. d. 2 Small transient changes in membrane potential caused by the activation of gated ion channels c. A depolarization of the postsynaptic membrane caused by the opening of ligand-gated ion channels. Efferent neurons that regulate the activity of the smooth muscles. cardiac muscle, and lands A narrow space that separates presynaptic and postsynaptic cells A type of neuroglia in vericbrules that produces myelin sheats around the axons of neurons in the CNS. i. A neuropeptide released at synapses in the CNS by sensory neurons activated by painful stimuli. Efferent neurons that carry impulses from the CNS to effectors such as muscles and glands 22 A nerve impulse that is produced when a particular level of depolarization is reached. L 33 Intercellular junctions between the branches of an axon and the dendrites of other neurons, muscle, or gland cells m. Myclinated axons in the central nervous system. n. An inhibitory neurotransmitter that causes the opening of ligand-gated ion channels for chloride ions. A subdivision of the autonomic nervous system whose nerve effects promote a rest and repose response. p. 34Chemical signals released by exocytosis when an action potential reaches the end of an anon Small gaps that interrupt a myelin sheath at intervals of I to 2 m. The division of the nervous system that includes the sensory and motor neurons. Membrane proteins that form pores through the membrane to allow the flow of specific ions in and out of the el An insulated covering surrounding many axons that consists of multiple layers of compacted membrane Neuropeptides released by axons descending from the brain into the spinal cord that block the perception of pan V. Part of the spinal nerve formed by motoraxons leaving from the entral surface of the spinal cord The division of the nervous system that includes the brain and the spinal cord. The balance between the diffusional force and the cloctrical force A neurotransmitter used in some arcas of the brain controlling body movements and other functions. A type of neuroglia in vertebrates that produces myelin sheaths around the axons of curons in the PNS. A hyperpolarization of the postsynaptic membrane caused by opening of ligand-gated ion channels for bb. Vesicles located at the swollen end of the presynaptic axon that release neurotransmitters. cc. 1 Afferent neurons that carry impulses from sensory receptors to the CNS. dd. The neuron whose axon transmits action potentials to the synapse. The grouping of the cell bodies of sensory neurons outside cach level of the spinal cord

Answer 1

a) A neurotransmitter that crosses the synapse between a motor neuron and a muscle fiber- 39) acetylcholine.

b) A permeability change in the membrane that makes the membrane potential more negative- 27) hyperpolarization.

c) A process extending from a neuron that conducts impulses away from a cell body- 12) axons.

d) small transient changes in membrane potentials caused by the activation of gated-ion channels- 24) graded potential.