What do graded and action potentials have in common? O Both cover great distances. O Both may be stimulated through electrical stimulation. O Both decrease in intensity over distance. O Both travel in one direction.

What do graded and action potentials have in common? O Both cover great distances. O Both may be stimulated through electrical stimulation. O Both decrease in intensity over distance. O Both travel in one direction.

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 9RE

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Question

What do graded and action potentials have in common?
O Both cover great distances.
O Both may be stimulated through electrical stimulation.
O Both decrease in intensity over distance.
O Both travel in one direction.

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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?
An action potential begins when ___ . a. a neuron reaches threshold potential b. voltage-gated potassium gates open c. voltage-gated .sodium gates dose d. sodium-potassium pumps stop operating
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
Which of the following is/are true about action potentials? Select all correct asnwers. Group of answer choices always has the same amplitude (amount of depolarization) always has the same duration information is coded through the frequency of action potentials action potentials can sum toge
IPSP differs from EPSP in :-a- being of shorter durationb- being unable o summate spatiallyc- moving the membrane potential away from thresholdd- depending upon opening of voltage K + channels
Of the following, which must be true for an action potential? I - Action potentials only occur when the threshold potential has been exceeded.II - A stimulus produces a full action potential, or does not produce an action potential at allIII - During the undershoot phase, it is much harder to fire another action potential I, II, and III I only I and III II and III
What do you mean by Action Potential in nervous system ?
What is/are true statements about Action Potentials? Select all that apply. Group of answer choices: A. action potentials propagate down axons B. nformation is coded through the frequency of action potentials C. action potentials are slower in myelinated axons D. action potentials vary depending on the strength of the stimulus
What event triggers an action potential?a. Opening of sodium channelsb. Opening of delayed potassium channelsc. High concentration of negative ions outside the celld. Activation of the sodium–potassium pump5. Ordinarily, a neuron’s trigger zone is activated b
What is/are true statements about Action Potentials? Select all that apply. Group of answer choices: A. action potentials propagate down axons B. information is coded through the frequency of action potentials C. action potentials are slower in myelinated axons D. action potentials vary depending on the strength of the stimulus
A change in the voltage across a neuron’s plasma membranethat makes the neuron less likely to fire an action potential isa. a change that makes the resting potential less negative.b. an excitatory postsynaptic potential.c. an inhibitory postsynaptic potential.d. a change that lowers the threshold.
What do you mean by resting potential in nervous system ?