The greater the influx of calcium into the presynaptic axon terminal, the greater theO magnitude of inhibition.release of neurotransmitter.O amplitude of the action potentialO rate of reuptake by an enzyme

An action potential in the presynaptic cell produces an influx of Ca2+which promotes the exocytosis…

Answered: The greater the influx of calcium into…

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

Section4.3: Action Potentials

Problem 2CYU

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Similar questions

An inhibitory postsynaptic potential (IPSP) is associated with O hyperpolarization a change in sodium ion permeability opening of voltage-regulated channels O the movement of calcium ions
The regulation of neurotransmitters DOES NOT include reuptake of the neurotransmission from the synaptic space degradation at the synaptic space O altering the rate of neurotransmitter release Ochanging the speed of receptor binding
Which of the following is true of ACh (acetylcholine)? O It cannot be degraded within the synaptic cleft to which it was released; it must be internalized and degraded by the cell that receives it O It is always excitatory because it causes the entrance of Na+ into a cell which leads to an increase in intracellular mV O It is released via exocytosis from the axon terminal of a somatic motor neuron O It is released via exocytosis from all pre-ganglionic motor neurons of the ANS
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.
Once an action potential reaches a neurotransmitter release site, the release of the neurotransmitter is triggered by: The influx of Na* through voltage-gated channels. O The efflux of Na* through voltage-gated channels. The influx of K* through voltage-gated channels. The efflux of K+ through voltage-gated channels. The influx of Ca²+ through voltage-gated channels. O The efflux of Ca2+ through voltage-gated channels.
Nerve transmission and communication with other neurons. DI it restores the membrane potential the chemical that talks between one neuron and the other neuron the point between the neuron and the muscle transmits impulse to dendrite it carries receptors on its surface it produces the neurotransmitter 1. Neurotransmitter 2. Presynaptic membrane 3. Postsynaptic membrane 4. Nat-K+ pump 5. Neuromuscular junction 6. Axon
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
If acetylcholinesterase fails to function properly, which of the following would be a consequence? O Inhibition of calcium channels O Inhibition of calcium pumps O Constant muscle cell relaxation Failure to reuptake acetylcholine
True or False: Calcium pumps in the axon terminal exchange molecules of calcium with molecules of potassium from the extracellular fluid
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
Action potentials propagate in one direction because of: O K+ Voltage-gated Channels become inactive for a while O Nat Voltage-gated Channels become inactive for a while O K+ nongated Channels become inactive for a while O Nat nongated Channels become inactive for a while
Which of the following structures has activity like acetylcholine? Et H3C Me H3C NMeg H.C NMes

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The greater the influx of calcium into the presynaptic axon terminal, the greater the O magnitude of inhibition mae of neurotransmitter. Omplitude of the action potential O rate of reuptake by entyme