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The general name for a chemical released when a neural signal reaches a neural ending is neurotransmitter.
Which specific neurotransmitter is released depends on exactly which neuron has fired; some instances of specific neurotransmitters are: adrenaline (epinephrine), glutamate, GABA (gamma-aminobutyric acid), acetylcholine, dopamine, serotonin, & melatonin.
With respect specifically to a neuromuscular junction, and with minor corrections, another contributor wrote:
When the nerve impulse reaches the nerve ending calcium is allowed into the cell and the synaptic vesicles in the motor neuron fuse to the bottom of the axon terminal of the motor neuron where they release ACh(Acetylcholine) into the synaptic cleft. So in this particular instance, Acetylcholine is your answer.
Wiki User
∙ 10y ago
Wiki User
∙ 6y agoA neurotransmitter of some sort. But not all are the same kind.
The binding of a neurotransmitter to the next part will cause one these three things to happen:
1. excitement (stimulation)
2. inhibition (stop activity)
3. modulation (change activity by slowing it or increasing it)
Wiki User
∙ 10y agoEpiniphrine
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Where does a nerve impulse start?
A nerve impulse starts at the dendrite
The duration of a nerve impulse is approximately?
A nerve impulse is approximately 1 millisecond.
When a single neuron sends a strong enough impulse to a muscle that how many muscle fibers does it cause to contract?
This will depend upon the number of muscle fibers the nerve innervates. However, all fibers innervated by the nerve should contract in response to the neuronal impulse.
What is the relay station for nerve impulses?
There is no relay station in nerve impulse conduction.
A nerve impulse starts at the dendrite then travels to the?
axon
What is quicker a nerve impulse or a hormone?
nerve impulse
When is acetycholine released?
acetylcholine is released from presynaptic neurons in response to a nerve impulse
Why does the frog sciatic nerve give a graded response?
The frog schiatic nerve gives a graded response because the nerve is a bundle of axons and not a single axon (thus it does not show the all or none response of an axon-either generating an action potential or not). If one axon is generating an action potential then a small nerve impulse is witnessed, if all axons are simultaneously generating action potentials then a large nerve impulse is witnessed. Thus the nerve impulse is graded (it can be none, small, medium, large, larger, maximal).
How is a nerve message different from a hormone message?
Hormone messageA hormone message is a chemical, and a hormone affects target organs and a nerve message is an electrical impulse hormone travels through the blood. A hormone has long lasting effects. A hormone is secreted by a glandNerve messageA nerve message affects the receiver. A nerve message goes through a nerve and a nerve message has very short term effects. A nerve message is initiated by a response to an exterior alteration.
Neurotransmitters are released from what end of an axon?
synaptic vesicles
Where does a nerve impulse start?
A nerve impulse starts at the dendrite
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
Which travels quicker through the body a nerve impulse or a hormons?
a nerve impulse
The neurotransmitters of a neutron enable a nerve impulse to do what?
they transport the nerve impulse through the synapses (:
Is ventricular systole responsible for nerve impulse?
no ventricular diastole is responsible for nerve impulse
What is the substance released at axon terminals?
The substance that is released at an axonal ending to propagate the nerve impulse to the next nerve or muscle is called
How does a single nerve impulse initiate many?
The nerve's endings are near to other nerve endings, when the potential of the potassium ion that is released is sensed by the other nerves they all might send an impulse to their other ends and the situation could be repeated.
