28 If a neurotransmitter increases the likelihood that the postsynaptic cell will send anaction potential, the neurotransmitter is said to bemandatory.anatomy.inhibitory.excitatory.facilitatory.

Answer: Neurotransmitters are the chemical messenger present in the body, which transmits the…

Answered: If a neurotransmitter increases the…

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 13RE

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Select all criterion for classifying a substance as a neurotransmitter. (select all that apply) Existence of the substance in the presynaptic terminal. Release of the substance when nerve impulses reach the terminal ending. Existence of specific receptors for the substance on the postsynaptic membrane. Ability of the substance to travel long distances between the site of origin and the target area.
Excitatory neurotransmitters: rev neurons up. calm neurons down. do not undergo re-uptake. All of the above
Temporal summation refers to: summation of action potentials in the temporal cortex. summation of postsynaptic potentials on a neuron occurring closely together in time. summation of postsynaptic potentials at different places on a neuron at the same time. summation of postsynaptic potentials in the temporal cortex.
Inhibitory postsynaptic potentials cause what type of change at the post-synaptic membrane? Hyperpolarization Depolarization Decreased threshold No change
Antidepressants work by O increasing presynaptic GABA secretion. increasing serotonin reuptake by the neuron. decreasing BDNF secretion by neurons. decreasing serotonin reuptake by the presynaptic terminal. All the answers are possible.
Explain the difference between slow and fast chemical transmission. Fig. 8.23
A neurotransmitter can have one of two effects on the postsynaptic neuron. If a neurotransmitter causes an increase in the likelihood that a neuron will send signals than the neurotransmitter is , but if it decreases the likelihood that it will send a signal than the neurotransmitter is : excitatroy : facilitating : impeding : inhibitory
An action potential has reached the axon terminal of a presynaptic cell. As a result of the action potential you would expect the movement of __________ into the presynaptic cell and the movement of __________ out of the presynaptic cell. Calcium : neurotransmitter Sodium : calcium Neurotransmitter : calcium Sodium : neurotransmitter
What word is used to describe the release of neurotransmitters to stimulate another cell? impulse integration synapse action potential
Cocaine blocks the removal of dopamine from the synapse, leading to a rapid rise of dopamine in the synapse. Which of the following best describes what will likely occur as a result of increased dopamine in the synapse? The presynaptic cell will be unable to release more neurotransmitter. the postsynaptic cell will return to its resting potential, causing feelings of well-being. The postsynaptic cell will be constantly activated, causing feelings of euphoria. The postsynaptic cell will respond more quickly to a change in output of the presynaptic cell, causing feelings of euphoria. The buildup of neurotransmitter will activate the presynaptic cell, causing feelings of euphoria.
In terms of function when a presynaptic neuron receiving input from a nearby inhibitory neuron, it can be inferred that the both neurons firing won't be synchronized activation of the inhibitory neuron is nullified activation of the presynaptic neurotransmitter release is enhanced this type of interaction represents a regulatory input of neuronal activation
Which of the following are the likely explanations for the failure of a postsynaptic neuron to trigger an action potential? Select all that apply. The EPSPs are neutralized by the neurotransmitter The summation of IPSPs and EPSPs is insufficient to depolarize the cell to threshold The synapses generating the EPSPs are too close to the axon hillock The synapses generating the EPSPs are too far from the axon hillock

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If a neurotransmitter increases the likelihood that the postsynaptic cell will send an action potential, the neurotransmitter is said to be