Assertion :The synaptic knob contains mitochondria and synaptic vesicles rich in chemical transmitters. Reason: Chemical transmitters are neurohormones. Their release is related to $C a^{+ +}$ influx.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is incorrect but Reason is correct

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The synaptic knob contain mitochondria, mitochondria help in movement of the vescicles by mediating $C a^{+} +$ . The synaptic vesicles are rich in chemical transmitters which are also neurohormones and their release is related to Ca $2 +$ influx. So, the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'

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Assertion :The synaptic knob contains mitochondria and synaptic vesicles rich in chemical transmitters. Reason: Chemical transmitters are neurohormones. Their release is related to Ca++ influx.

Assertion :The synaptic knob contains mitochondria and synaptic vesicles rich in chemical transmitters. Reason: Chemical transmitters are neurohormones. Their release is related to $C a^{+ +}$ influx.