Question

What is reflex action give two example illustrate the pathway followed by a message from the receptor in a reflex action?

Answer 1

Answer:

Reflex action is the way by which the body responds to external stimuli/stimulus .These are often regulated by the spinal cord and are involuntary.

Explanation:

Mechanism:-

• Receptor receptor organ which receives the stimulus and initiates as a sensory nerve impulse
• sensory or afferent nerve fibre which conducts sensory impulse from the receptor organ to the spinal cord
• a portion of central nervous system i,e; spinal cord
• motor or efferent nerve fibre which conducts motor nerve impulse from spinal cord to the effectors
• effector organ which produces involuntary response to the stimulus

Answer 2

Explanation:

The simplest form of response in the nervous system is a reflex action a reflex action is performed automatically . For example, moving our hand away on touching a hot plate is an example of reflex action a reflex action is an automatic response to a stimulus.