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 terminalending.Existence of specific receptors for the substance on thepostsynaptic membrane.Ability of the substance to travel long distances between the siteof origin and the target area.

Neurotransmitters are chemical messengers that are employed by the body to transmit nerve impulses…

Answered: Select all criterion for classifying a…

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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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
Of the below, what do neurotransmitters do? stimulate presynaptic terminals. remain in the synaptic cleft for long periods of time. do not affect membrane channels in the postsynaptic membrane. bind irreversibly to the receptor molecules of the postsynaptic membrane. cause the production of action potentials in the postsynaptic membrane.
Synaptic fatigue is due to : -a- decreased synthesis of neurotransmittersb- inability to release neurotransmitters by exocytosisc- failure of action potentials to open voltage-gated Ca ++ channels in presynaptic terminald- imbalance in between rates of synthesis and release of neurotransmitters
What word is used to describe the summation of excitatory and inhibitory stimuli by a neuron? synapse impulse integration action potential
Presynaptic inhibition is characterized by all the following, except :-a- increased Cl- influx into presynaptic terminalsb- increased Ca ++ influx into presynaptic terminalsc- decreased response of postsynaptic receptorsd- hyperpolarization of presynaptic terminals
A neuron releases an excitatory neurotransmitter. Some neurons are stimulated and some are not. How is it possible that the same signal activates one neuron and not the other?
An autonomic neuroeffector junction Has the same structure as a somatic motor neuroeffector junction Uses only acetylcholine as a neurotransmitter Releases neurotransmitter from varicosities Does not require calcium for the release of the neurotransmitter
Please note these are all one question group and should be answered as such! Which of the following statements accurately defines epineurium? A. Fluid-filled space at a synapse through which neurotransmitters diffuse B. A vesicle containing neurotransmitters in the axon terminal of a neuron C. The CT sheath that binds together the groups of fascicles, blood vessels, and lymphatic vessels in a peripheral nerve D. The branch of the ANS that adapts the body for rest and digestion Which of the following statements accurately defines sacral plexus? A. The ventral rami of C1–C4 (and a small contribution from C5) that serve the head and neck B. The ventral rami of L1–L4 that serve the pelvis and lower limb C. The ventral rami of C5–T1 that serve the upper limb D. The ventral rami of L4–S4 that serve the pelvis and lower limb
Which of the following neurotransmitters would activate an adrenergic receptor? Acetylcholine Glutamate Norepinephrine Dopamine
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
Visit this site (http://openstaxcollege.org/l/neurolab)to see a virtual neurophysiology lab, and to observeelectrophysiological processes in the nervous system,where scientists directly measure the electrical signalsproduced by neurons. Often, the action potentials occur sorapidly that watching a screen to see them occur is nothelpful. A speaker is powered by the signals recorded froma neuron and it “pops” each time the neuron fires an actionpotential. These action potentials are firing so fast that itsounds like static on the radio. Electrophysiologists canrecognize the patterns within that static to understand whatis happening. Why is the leech model used for measuringthe electrical activity of neurons instead of using humans?
When a neuron fires an action potential, the information travels through the axon,the dendrites, and the cell body, but not in that order. Place these three structures in the correct order.

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