Question

The simplest form of nervous system that integrates body activities is found in cnidarians and it is known as

• A. Nerve-trunk system
• B. Ladder system
• C. Nerve-net system
• D. Nerve-cord system

Answer 1

The correct option is C Nerve-net system

Nerve net is a diffuse network of nerve cells that serves to connect the sensory cells in the body wall to contractile and gland cells. These sensory cells receive impulses and stimuli while nerve cells conduct impulses in all directions and help hydra (cnidarians) to respond. This is the simplest form of the nervous system which is observed in the cnidarians.

Thus, the correct answer is option C.