Question

Assertion(A): Arachnoid layer helps in speeding up the transmission of nerve impulses along the axons.

Reason(R): Axon endings at the synapse secrete acetylene.

Options

• (A) is true and (R) is false.

• (A) is false and (R) is true.

• Both (A) and (R) are true.

• Both (A) and (R) are false.

Answer 1

Both (A) and (R) are false.

Explanation:

The arachnoid layer protects the meninges but does not affect nerve impulse transmission speed. At the synapse, axons release neurotransmitters such as acetylcholine rather than secreting acetylene.