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Question: 42 Opening of sodium channels in the axon membrane causes: ) Jdepolarization. repolarization C) hyperpolarization. D) increased negative charge inside the membrane. E) inhibition. 43. During repolarization of a neuron: A) sodium ions move out of the cell. B) potassium ions move out of the cell. potassium ions move into the cell. both sodium and potassium ions move into the cell. sodium ions move into the cell. 44. Which of the following types of nerve fiber possesses the fastest speed of impulse propagation? A) type A B) type B C) type C D) type D E) type E 45. At the normal resting potential of a typical neuron, its sodium-potassium exchange pump transports A) 1 intracellular sodium ion for 2 extracellular potassium ions. B) 2 intracellular sodium ions for 1 extracellular potassium ion. C) 3 intracellular sodium ions for 1 extracellular potassium ion D) 3 intracellular sodium ions for 2 extracellular potassium ions. E) 3 extracellular sodium ions for 2 intracellular potassium ions. 46. Voltage-gated channels are present: A) at the motor end plate. B) on the surface of dendrites. C) in the axolemma (membrane that covers axons). D) on the soma of neurons. E) along the perikaryon of neurons. 47. Rapid impulse conduction from “node” to “node” is called: A) spatial propagation. B) saltatory propagation. C) divergent propagation. D) synaptic transmission. E) continuous propagation open or close in response to binding specific molecules. 48. A) leak channels B) activated channels C) chemically-gated channels D) voltage-gated channels E) voltage-gated and chemically-gated channels – Free Chegg Question Answer

Transcribed text From Image: 42 Opening of sodium channels in the axon membrane causes: ) Jdepolarization. repolarization C) hyperpolarization. D) increased negative charge inside the membrane. E) inhibition. 43. During repolarization of a neuron: A) sodium ions move out of the cell. B) potassium ions move out of the cell. potassium ions move into the cell. both sodium and potassium ions move into the cell. sodium ions move into the cell. 44. Which of the following types of nerve fiber possesses the fastest speed of impulse propagation? A) type A B) type B C) type C D) type D E) type E 45. At the normal resting potential of a typical neuron, its sodium-potassium exchange pump transports A) 1 intracellular sodium ion for 2 extracellular potassium ions. B) 2 intracellular sodium ions for 1 extracellular potassium ion. C) 3 intracellular sodium ions for 1 extracellular potassium ion D) 3 intracellular sodium ions for 2 extracellular potassium ions. E) 3 extracellular sodium ions for 2 intracellular potassium ions. 46. Voltage-gated channels are present: A) at the motor end plate. B) on the surface of dendrites. C) in the axolemma (membrane that covers axons). D) on the soma of neurons. E) along the perikaryon of neurons. 47. Rapid impulse conduction from "node" to "node" is called: A) spatial propagation. B) saltatory propagation. C) divergent propagation. D) synaptic transmission. E) continuous propagation open or close in response to binding specific molecules. 48. A) leak channels B) activated channels C) chemically-gated channels D) voltage-gated channels E) voltage-gated and chemically-gated channels

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