Channel labels Voltage-gated K* channels. Voltage-gated Na* channels Ligand-gated Na* channels. Voltage-gated K* channels. on movement labels K* exits cell Na* enters cell K* exits cell Na enters cell Graded potential Depolarization (EPSP) +30 -70 Time (msec) +30 mv Depolarization -70- Action potential Time (msec) +30 mv -70 Repolarization Time (msec) Overshoot Hyperpolarization +30 N Time (msec) -70-

Channel labels Voltage-gated K* channels. Voltage-gated Na* channels Ligand-gated Na* channels. Voltage-gated K* channels. on movement labels K* exits cell Na* enters cell K* exits cell Na enters cell Graded potential Depolarization (EPSP) +30 -70 Time (msec) +30 mv Depolarization -70- Action potential Time (msec) +30 mv -70 Repolarization Time (msec) Overshoot Hyperpolarization +30 N Time (msec) -70-

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter4: Principles Of Neural And Hormonal Communication

Section: Chapter Questions

Problem 1RE: Conformational changes in channel proteins brought about by voltage changes are responsible for...

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Similar questions

Conformational changes in channel proteins brought about by voltage changes are responsible for opening and closing Na+ and K+ gates during the generation of an action potential. (True or false?)
Which of the following voltages would most likely be measured during the relative refractory period? +30 mV 0 mV -45 mV -80 mv
Action potential +40 55 Threshold Falled initiations Resting state -70 Stimulus 1 Refractory period Time (ms) At the peak of the action potential, which of the following are true? Select all that apply the membrane potential is close to but less that the K+ equilibrium potential |voltage gated K+ channels close voltage gated K+ channels open the membrane potential is close to but less that the Na+ equilibrium potential Voltage (mV) Depolarization Repolarization
At resting membrane potential for a typical neuron (-70 mV), which ion does NOT move?Na+Ca2+K+Cl-None
Action potentials propagate in one direction because of: O K+ Voltage-gated Channels become inactive for a while O Nat Voltage-gated Channels become inactive for a while O K+ nongated Channels become inactive for a while O Nat nongated Channels become inactive for a while
What is the equilibrium potential of chloride for a typical neuron? We will use the following ion concentrations and equilibrium potentials: lon Inside concentration (mM) Outside concentration (mM) Equilibrium Potential Sodium 15 145 +60 mV Potassium 125 5 -85 mV Chloride 13 150 -65 mV 60mV -80mV -90mV -65mV
Synaptic terminal Neurotransmitter Vesicle Calcium channel Receptor for neurotransmitter Synaptic cleft SENDING NEURON RECEIVING NEURON 000
Threshold is the minimum depolarization needed to________ Repolarize the membrane Open voltage-gated Na+ channels Overcome the absolute refractory period Release synaptic vesicles containing neurotransmitters Prevent the polarizing limit
Which phase in the generation of action potential is represented by N? +30 M N K -55 -70 Time Repolarization Depolarization Hyperpolarization Hypopolarization Membrane potential (mV)
[Na*] [K*] This diagram is a drawing of normal conditions that occur in a neuron's axon (not all details are included). This stage that a living neuron would be in, would show that O no positive ions are inside the cell current is traveling down the axon O the cell will be at rest once the Na ions enter the cell O the cell is at rest O Na ions are predominantly outside the cell
Each of the following is a correct relationship between action potential phase and channel status except Select one: O A. hyperpolarizing phase; Na channels open O B. repolarizing phase; K channels open O C. depolarization; Na channels open O D. hyperpolarizing phase; K channels open O E. repolarizing phase; Na channels closed
Depolarization phase --Click to select-- Chemically-gated potassium channels Chemically-gated sodium channels Voltage-gated potassium channels Voltage-gated sodium channels Repolarization phase --Click to select-- Voltage-gated potassium channels Voltage-gated sodium channels Chemically-gated sodium channels Chemically-gated potassium channels Hyperpolarization phase --Click to select-- Voltage-gated sodium channels Chemically-gated potassium channels Voltage-gated potassium channels Chemically-gated sodium channels