describe what happens at the synapse of two neurons.?

Question

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Answer 1

The synapse is the place where the axon of one neuron contacts the dendrite or cell body (soma) of the next neuron. The sending neuron is called the presynaptic neuron, and the receiving neuron is called the postsynaptic neuron. The firing response, called the action potential, is an electrical message that travels down the axon of the presynaptic neuron to the axon terminal, where it stimulates the release of stored neurotransmitters into the synaptic cleft. These neurotransmitters bind at receptor sites on the postsynaptic neuron and influence whether this receiving neuron will in turn fire an action potential of its own. All this happens in milliseconds!

Answer 2

This question is very vague but I'll give you an example of a neurochemical synapse found all over the body.

A synapse is the space between two neurons, namely the axon of one and the dendrite of another. As an action potential is propagated towards the synaptic bulb it activates voltage gated calcium channels. The rapid influx of calcium that ensues causes the release of a neurotransmitter that finds a receptor on the dendrite.

The neurotransmitter is then degraded by free flowing enzymes (acetylcholinesterase being the most common) and then portions of the broken down molecule are taken back up by the axon and reconverted into a neurotransmitter.

This is a very elementary definition but it should suffice. There is also an electrical synapse that utilizes gap junctions instead of neurotransmitters but I deal in pharmacology and don't come in contact with them much.

Answer 3

most generally the stimulus will travel in one direction either afferent or efferent the stimulus is chemical (neurotransmitters) between neurons and electrical inside of each neuron that's why it's called an electro-chemical stimulus the chemical leaves one neuron and crosses the synapse to the next neuron it opens ligand gated channels that let ions into the next neuron the ions build charge (depolarizing) the cell body in other words, the cell body integrates the accumulated charge into electrical called an action potential the action potential electric stimulus travels down the axon if the axon is myelinated it travels faster when the electric stimulus reaches the end of the axon it releases chemical that chemical (neurotransmitter) crosses the synapse to the next neuron

Answer 4

A flow of a neurotransmitter chemical passes from one cell to the other through the space between. Neurotransmitters include epinephrine, norepinephrine, serotonin, and *gamma*-aminobutyric acid. These chemicals send a signal to the other cell: "Do something!" The "something" is an electrical signal sent through the cell body to the next synapse. At each synapse, there is a powerful stimulus to take up the neurotransmitter chemical again to the cell. Unless that happens, the neurotransmitter stays in the synapse forever, sending the neverending signal "Do it! Do it! Foreeeeeeeeeeeeeeever! Some antipsychotic drugs act as selective re-uptake inhibitors.

Answer 5

The neurotransmitters " jump the gap ", from one neuron to another. Overly simplified.