Question

Find out the correct statement among the following:-

• A. Nerve impulses are less effective than chemical signals because of slow transmission.
• B. Chemical signals are less effective than nerve impulses because they have localized effects.
• C. Nerve impulses and chemicals signals both are equally effective.
• D. Nerve impulses are less effective than chemical signals as they cannot reach all cells as the chemicals signals do.

Answer 1

The correct option is D

Nerve impulses are less effective than chemical signals as they cannot reach all cells as the chemicals signals do.

Nerve impulses cannot reach out to all cells of the body because nerve endings do not reach all cells whereas chemical signals (hormones) can easily diffuse in the body and can reach all the cell continuously and persistently.