Why is the flow of signals in a synapse from | vedclass

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(D) When an electrical impulse reaches the axonal end (synaptic knob) of a neuron,it triggers the release of chemical substances known as neurotransmi

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(D) When an electrical impulse reaches the axonal end (synaptic knob) of a neuron,it triggers the release of chemical substances known as neurotransmitters into the synaptic cleft.These chemicals diffuse across the synapse towards the dendritic end of the adjacent neuron.At the dendritic end,these chemicals bind to specific receptors to generate a new electrical impulse.Since the neurotransmitters are stored only in the synaptic vesicles at the axonal end and the receptors are located only on the dendritic membrane,the signal can only flow in one direction: from the axon of one neuron to the dendrite of another.

Column $(A)$	Column $(B)$
$(a)$ Olfactory receptors	$(i)$ Tongue
$(b)$ Thermoreceptors (temperature receptors)	$(ii)$ Eye
$(c)$ Gustatoreceptors	$(iii)$ Nose
$(d)$ Photoreceptors	$(iv)$ Skin

Why is the flow of signals in a synapse from the axonal end of one neuron to the dendritic end of another neuron,but not in the reverse direction?

Similar Questions

Match the terms of Column $(A)$ with those of Column $(B)$.

Column $(A)$ Column $(B)$

$(a)$ Olfactory receptors $(i)$ Tongue

$(b)$ Thermoreceptors (temperature receptors) $(ii)$ Eye

$(c)$ Gustatoreceptors $(iii)$ Nose

$(d)$ Photoreceptors $(iv)$ Skin

What is the role of the brain in reflex action?

State in brief how the communication between the central nervous system and the other parts of the body is facilitated.

$(i)$ Differentiate between sensory neurons and motor neurons.
$(ii)$ How is the brain protected in our body?
$(iii)$ Name the part of the brain responsible for the precision of voluntary actions and maintaining body posture and balance of the body.

What is the gap between two neurons called?

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