The following figure shows the structure of a | vedclass

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(D) In the given figure of a neuron:$P$ represents the cell body (cyton) which contains the nucleus and Nissl's granules.$Q$ represents the Schwann ce

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$S$

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(D) In the given figure of a neuron:$P$ represents the cell body (cyton) which contains the nucleus and Nissl's granules.$Q$ represents the Schwann cell.$R$ represents the axon.$S$ represents the synaptic knob (axon terminal).Neurotransmitters are chemical substances stored in synaptic vesicles within the synaptic knobs $(S)$.When an action potential reaches the synaptic knob,these neurotransmitters are released into the synaptic cleft to transmit the signal to the next neuron or effector cell.Therefore,the correct option is $S$.

The following figure shows the structure of a neuron. Which of the following parts contains neurotransmitters?

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