1.

Assertion (A) Chemical messengers are chemicals that enable communications of message between tow neurons or between or between neurons and muscles. Reason (R) Chemicals enter the cell through receptor.

Answer»

If both assertion and REASON are trueand reason is the correct EXPLANATIONOF assertion .
If both assertion and reason are true but reason is not the correct explanationof assertion .
If assertion is true but reason is false.
If both assertion and reason are false.

SOLUTION :Chemicals bind to the receptor SITES present on the surface of the membrane of the CELL.


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