When a membrane channel opens, there is a reduction in the membrane_ which generates allowing ions to enter the neuron increasing the membrane measured by a change in capacitance, resistance, potential energy, voltage voltage, capacitance, potential energy, resistance resistance, capacitance, potential energy, voltage potential energy, resistance, voltage, capacitance

When a membrane channel opens, there is a reduction in the membrane_ which generates allowing ions to enter the neuron increasing the membrane measured by a change in capacitance, resistance, potential energy, voltage voltage, capacitance, potential energy, resistance resistance, capacitance, potential energy, voltage potential energy, resistance, voltage, capacitance

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 17RE

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Similar questions

Membrane permeability at the rising phase of an action potential is dominated by: O Co-transporters Nongated Channels O K+ Voltage-gated Channels O Na+ voltage-gated Channels O Chemically-gated Channels
Repolarization occurs because Multiple Choice more sodium ions diffuse into the cell than potassium ions diffuse out of it. potassium ions continue to diffuse out of the cell after the inactivation gates of the voltage-gated sodium ion channels begin to close. the increased potassium ion permeability lasts slightly longer than the time required to bring the membrane potential back to its resting level. the extra efflux of potassium ions causes the membrane potential to become slightly more positive than the resting value. the inactivation gates of the voltage-gated sodium ion channels begin to open and the diffusion of sodium ions decreases.
The resting voltage of the cell membrane: O is a property of the cell O is generated by mechanically-gated channels, voltage-gated channels, and ligand-gated channels O is defined by the difference in overall ionic charges between the two sides of the membrane O has a negative value at rest in all cells except neurons O all of the above
Which of the following occurs immediately after the peak of an action potential? The membrane potential begins to repolarize O Voltage gated potassium channels are open Ⓒ Voltage gated sodium channels are inactivated The cell is in the absolute refractory period All of the above
The interior of a neuron's plasma membrane at resting membrane potential will have a positive charge and contains less sodium than outside of the cell positive charge and contains more sodium than outside the cell negative charge and contains less sodium than outside the cell O negative charge and contains more sodium than outside the cell
In the pictured chart of an action potential, in what portion portion are the voltage gated Na+ channels open? +50 Membrane Potential (mV) -50 B F E -100 Time O A O B O D O E O F O Both D and E earch
If action potential propagation from one neuron to another neuron requires ACh release, what event at the synaptic cleft explains the need for action potentials to arrive at a high rate before the post-synaptic membrane achieves threshold? the lack of sodium voltage gated channels on the post-synaptic membrane O the rapid breakdown of ACh by ACHE at the synaptic cleft the slow release of ACh by the synaptic vessicles the slow movement of sodium through chemical gates Previous Next MacBook Air
Which of the following describes a threshold potential? A brief reversal of the charge difference across a neuron's plasma membrane The membrane potential at which voltage-gated sodium channels in a neuron axon open, causing an action potential The membrane potential of a neuron at rest
Which of the following does NOT contribute to the establishment or maintenance of the neuron resting membrane potential? Oa sodium and potassium ions are actively transported across the cell membrane which maintains the resting membrane potential Ob. negatively charged proteins are inside the neuron and are not transported out Oc potassium ions are highly concentrated outside the cell and their are many potassium leakage channels in the membrane Od. sodium ions are more highly concentrated outside the cell and there are fewer sodium ion leakage channels in the membrane
A neuron has a resting membrane potential of -70 milivolts (mV) and a threshold value of -55 mV. Three synapses on the body of this neuron receive the impulses listed below. hyperpolarisation by 5 mV • depolarisation by 15 mV • depolarisation by 10 mV ENTER THE MEMBRANE POTENTIAL AS A NUMBER WITH + OR - IN FRONT OF IT. The final membrane potential will be mV and this cause an action potential becasue it is v than the
After a neuron fires an action potential, the ion concentration gradients are disrupted. What reestablishes the normal concentration gradient? O Influx of negatively charged ions into the cell O Outtlow of K+ ions via passive fon channels Na+/K+ pump action O Outflow of Na ions via passive ion channels
During the action potential waveform, the voltage returns to the resting membrane potential at -70mV through the: closing of potassium channels. opening of chloride channels. O opening of sodium channels. opening of potassium channels.