Question

what is reflex? why reflex arc developed in animals!? write the component of a reflex arc
give only the right answer ok​

Answer 1

1. What is reflex?

Ans. In biology, a reflex, or reflex action. A reflex is made possible by neural pathways called reflex arcs which can act on an impulse before that impulse reaches the brain. The reflex is then an automatic response to a stimulus that does not receive or need conscious thought.

2.  why reflex arc developed in animals!?

Ans. The pathway taken by nerve impulse in a reflex action is called the reflex arc Reflex arcs have evolved in animals because the thinking process of brain is not fast enough. However, even after complex neuron networks have come into existence, reflex are continue to be more efficient for quick responses.

3. write the component of a reflex arc

Ans. The simplest arrangement of a reflex arc consists of the receptor, an interneuron (or adjustor), and an effector; together, these units form a functional group. Sensory cells carry input from the receptor (afferent impulses) to a central interneuron, which makes contact with a motor neuron.