Which of the following is false regarding chemical synapses...

Which of the following is FALSE regarding chemical synapses? The synapses are filled with vesicles containing neurotransmitters. Neurotransmitters are sent from one cell to another to initiate change in a cell's activity. The change in cell activity is short-lived, so multiple action potentials must occur to cause more neurotransmitter to be released. None of the listed responses is false; all are true.

Transcript

0:00 Hello.

00:01 So here we are going to talk about synapse and action potential.

00:10 So what is a synapse? so a synapse, it is basically a junction that is found or that is present between two neurons.

00:24 That is between neurons there is space present which acts like a junction and it is called as synapse.

00:31 Now the synaptic junction, it can further be of two types.

00:34 The first is an electrical synapse wherein the impulse it is going to travel via the gap junction.

00:47 And the other type of junction which is most common is the chemical junction or chemical synapse wherein small molecules that are called as neurotransmitters.

01:05 They are contained in separate vesicles which are present in the presynaptic terminal of the pre -synaptic terminal of the pre -snaping.

01:15 Neuron.

01:18 Now if we study about the action potential then once an action potential reaches the end of the neuron what happens is that certain channels that is the calcium ion channels they open up and there is an influx of calcium ions now because of this influx the synaptic vesicles which have neurotransmitters in them they are going to fuse with the pre -synaptic membrane and this fusion it is going to cause the release of the neurotransmitters and these neurotransmitters they are released now into the synapse that was present between the two neurons wherein they travel across this synapse and reach the post -synaptic neuron that is the neuron present after the synapse and here they are going to bind for some time to the receptors that are present at the post -synaptic neuron on the chemically gated ion channels.

02:40 Now this binding it is for a very short duration after some time the sodium channels they are going to open and once they open there is going to be an influx of sodium ions and once enough sodium ions are present there the new neuron it is going to depolarize and reach the required threshold and from here there will be emergence of a new action potential.

03:23 Now the neurotransmitters that have reached here what is going to happen to them.

03:29 So the neurotransmitters are normally degraded by the enzymes as in case of acetylcholine the enzyme that is responsible for the degradation is called as colon esterase.

03:49 So now if we have to write the answers it is going to be as follows...

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