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Is calcium a neurotransmitter?
No, calcium itself is not a neurotransmitter BUT it is highly important in the process of the action potential. The action potential triggers the influx of calcium at the end of the terminal bouton, causing the influx of Ca2+ into the cell and this triggers for the release of the neurotransmitter. :)
What type of ions moves into the cell in response to this neurotransmitter?
well check out papuyaar.com it should help
When the what reaches the end of the axon the neurotransmitter is released?
When the _____________reaches the ends of the axon the neurotransmitter is released and it diffuses to the muscle cell membrane to combine with receptors there?Sarcolemma
What a neurotransmitter is?
A neurotransmitter is a chemical or peptide in synapses, usually between neurons, a neuron and muscle or a neuron and other organ. The neurotransmitter transmits information to and from and within the brain. When a neurotransmitter is released from the presynaptic cell in response to depolarization of the cell by an action potential, it diffuses across the synaptic cleft and binds a receptor or ligand-gated ion channel on the postsynaptic cell. Binding on the postsynaptic cell alters the resting potential of the postsynaptic cell in either an inhibitory or excitatory manner, making the cell less susceptible or more susceptible (respectively) to an action potential. Examples include, but are not limited to, acetylcholine, GABA, noradrenaline, serotonin and dopamine.
What is permissive action as in the nervous system?
In the nervous system, permissive action refers to one neurotransmitter enhancing the effect of another neurotransmitter. This occurs when one neurotransmitter prepares receptors to be more responsive to another neurotransmitter, allowing for a more amplified response.
When an action potential reaches the nerve terminal, what happens to the neurotransmitter release?
When an action potential reaches the nerve terminal, it triggers the release of neurotransmitters into the synapse.
What would happen if the re-uptake of a stimulatory neurotransmitter was blocked?
The action of the excitatory neurotransmitter will increase, since its concentration in the synapse will rise.
What kind of potential is it when a neuron fires?
When a signal is sent out from the nervous system it is caused a release of a neurotransmitter that releases an action potential.
What is the difference between presynaptic and postsynaptic neurons?
Presynaptic neurons release the neurotransmitter in response to an action potential. Postsynaptic neurons receive the neurotransmitter (and can however become presynaptic to the next nerve cell, if the neurotransmitter has stimulated the cell enough).
Is calcium a neurotransmitter?
No, calcium itself is not a neurotransmitter BUT it is highly important in the process of the action potential. The action potential triggers the influx of calcium at the end of the terminal bouton, causing the influx of Ca2+ into the cell and this triggers for the release of the neurotransmitter. :)
True or False A neurotransmitter substance crosses the synaptic cleft between a nerve and muscle fiber and stimulates the nerve to have an action potential?
False
What type of ions moves into the cell in response to this neurotransmitter?
well check out papuyaar.com it should help
When the what reaches the end of the axon the neurotransmitter is released?
When the _____________reaches the ends of the axon the neurotransmitter is released and it diffuses to the muscle cell membrane to combine with receptors there?Sarcolemma
Why is the destrructuction of the neurotransmitter important in controllin the activities of the nervous system?
Firstly, we need the neurotransmitter at synaptic junctions to stimulate an action potential on the postsynaptic neurone. Continued amounts of neurotransmitter will keep Na+ diffusing in, and will keep the action potential resending when the period of refraction should be occurring.Therefore, if we do not destroy the neurotransmitter when it is not needed, a signal will keep being sent, and the effector muscle/gland will keep being stimulated.For example, touching a hot plate results may result in your bicep contracting to pull your arm away. If the neurotransmitter isn't destroyed, your bicep will keep contracting even after the event.
What is a chemical substance that mimics the action of a neurotransmitter?
A chemical substance that mimics the action of a neurotransmitter is called an agonist. Agonists bind to the same receptors as the neurotransmitter and produce similar effects in the body.
What a neurotransmitter is?
A neurotransmitter is a chemical or peptide in synapses, usually between neurons, a neuron and muscle or a neuron and other organ. The neurotransmitter transmits information to and from and within the brain. When a neurotransmitter is released from the presynaptic cell in response to depolarization of the cell by an action potential, it diffuses across the synaptic cleft and binds a receptor or ligand-gated ion channel on the postsynaptic cell. Binding on the postsynaptic cell alters the resting potential of the postsynaptic cell in either an inhibitory or excitatory manner, making the cell less susceptible or more susceptible (respectively) to an action potential. Examples include, but are not limited to, acetylcholine, GABA, noradrenaline, serotonin and dopamine.
How do nerves impulse's across the synapse?
Most neurons have a chemical synapse, which is to say that a substance called a neurotransmitter is released from the first neuron (called pre-synaptic) to the next neuron called (post-synaptic). How is the release triggered? When an action potential reaches the terminus (end of the axon) there are specialized calcium channels that are opened (voltage-gated). The calcium bind so the inner membrane and triggers the release of small membrane bound vesicles which spill out their contents of neurotransmitter into the synaptic cleft. The neurotransmitter binds to specific receptors on the post-synaptic membrane and that causes the action potential to propagate on (or for the neurotransmitter to cause an action like a muscle contraction).
