Question

Assertion : Transmission of the nerve impulse across a synapse is accomplished by neurotransmitters.

Reason : Transmission across a synapse usually requires neurotransmitters because there is small space i.e., synaptic cleft, that separates one neuron from another.

(a) Both A and R are true and R is the correct explanation of A.

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

Correct option (a) Both A and R are true and R is the correct explanation of A.

Explanation :

Neurotransmitter is a chemical substance that mediates the transmission of a nerve impulse across a synapse. Synapse is the close proximity of the axon of one neuron and the dendrite or cyton of another neuron with a gap of just about 200 in between. This gap is known as synaptic cleft.