A post-synaptic cell receives a signal that causes it to hyperpolarize. Which statement is NOT true about thisdynamic?O The cell is now more negative than it was before.This describes an EPSPIt will be harder for the cell to reach threshold and generate a new action potential.O This could have been achieved through either spatial or temporal summation.

Action potentials are nerve messages. Neurons produce and convey these signals through their…

A post-synaptic cell receives a signal that causes it to hyperpolarize. Which statement is NOT true about this dynamic? The cell is now more negative than it was before. O This describes an EPSP O Itwill be harder for the cell to reach threshold and generate a new action potential. O This could have been achieved through either spatial or temporal summation.

A post-synaptic cell receives a signal that causes it to hyperpolarize. Which statement is NOT true about this dynamic? The cell is now more negative than it was before. O This describes an EPSP O Itwill be harder for the cell to reach threshold and generate a new action potential. O This could have been achieved through either spatial or temporal summation.

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

When action potentials arrive at a synapse between a neuron and another cell, they stimulate the release of molecules of a ________ that diffuse over to that cell.
Watch this video (http://openstaxcollege.org/l/summation) to learn about summation. The process of converting electrical signals to chemical signals and back requires subtle changes that can result in transient increases or decreases in membrane voltage. To cause a lasting change in the target cell, multiple signals are usually added together, or summated. Does spatial summation have to happen all at once, or can the separate signals arrive on the postsynaptic neuron at slightly different times? Explain your answer.
Saltatory conduction (a) requires more energy than continuous conduction (b) occurs in unmyelinated neurons (c) occurs when the action potential jumps from one node of Ranvier to the next (d) slows transmission of an impulse (e) depends on the action of GABA
Stellate cells initially process sensory input to the cortex, whereas pyramidal cells send fibers from the cortex to terminate on efferent motor neurons. (True or false)
Watch this video (http://openstaxcollege.org/l/neurotrans) to learn about the release of a neurotransmitter. The action potential reaches the end of the axon, called the axon terminal, and a chemical signal is released to tell the target cell to do something, either initiate a new action potential, or to suppress that activity. In a very short space, the electrical signal of the action potential is changed into the chemical signal of a neurotransmitter, and then back to electrical changes in the target cell membrane. What is the importance of voltage-gated calcium channels in the release of neurotransmitters?
Suppose you stimulate an axon so that you generate an actionpotential at both ends at the same instant. Describe thepropagation of these action potentials. What happens when theymeet?
During a relative refractory period of an action potential A. Another action potential can be fired, it just takes a greater stimulus for the membrane potential to reach threshold B. Na+ channels are either already open or are inactivated therefore the membrane absolutely can not produce another action potential, no matter how intense the stimulus C. Ca++ flows out of the cell, causing hyperpolarization and a need for a greater stimulus to generate the action potential D. The presynaptic neuron "tells" the postsynaptic neuron about the "relative" strength of signal E. None of the above are correct
When a postsynaptic neuron is adequately stimulated, action potentials develop at the initial segment of the axon because :-a- it contains many voltage-gated Na + channelsb- it contains the highest concentration of ligand-gated cation channelsc- it contains many voltage-gated Ca ++ channelsd- it is more sensitive to the direct stimulant effect of neurotransmitters
When EPSP and IPSP occur simultaneously the postsynaptic membrane :-a- becomes depolarizedb- becomes hyperpolarizedc- initiates an action potentiald- shows potential changes that depend upon the summation of their effects
Excitatory neurons A and B both synapse with neuron C. Neuron A releasesa neurotransmitter, and neuron B releases the same type and amount ofneurotransmitter plus a neuromodulator that produces EPSPs in neuron C.Action potentials produced in neuron A alone can result in action potentialproduction in neuron C. Action potentials produced in neuron B alone alsocan cause action potential production in neuron C. Which results in moreaction potentials in neuron C, stimulation by only neuron A or stimulationby only neuron B? Explain.
A loss-of-function mutation in the ion channel responsible for thegeneration of end-plate potentials results in a diminished permeabilityof the ion channel. 1) How would you experimentally test the effect of the mutation on thefunctional properties of the cell (synapse)? You should discuss the typesof postsynaptic responses and physiological parameters you couldmeasure.
Post synaptic neurons membrane potentials are less negative than resting membrane potentials when this occur A. Creates a new set point for the resting membrane potential B. Has a lower propensity to produce an action potential C. Reacts by generating action potential D. Higher chance of reaching the potential threshold