(a) What is a reflex action? Explain with the help of an example.(b) Define reflex arc. Give the flow chart of a spinal reflex arc.(c) How are involuntary actions and reflex actions different from each other?

(a) Reflex action is an involuntary, rapid and automatic response in the body to a stimulus. If we see an intense beam of light we automatically blink our eyes.
For example, if we unknowingly touch a hot plate, we immediately move our hand away from it.

(b) Reflex arc is the path taken up by the nerve impulses during a reflex action.




(c) Difference between involuntary actions and reflex actions are as follows:
Involuntary actions Reflex action
1. All involuntary actions are not reflexes. 1. All reflex actions are involuntary in nature.
2. Involuntary actions are the normal actions given by the internal or external organs of the body, which do not need thinking and performed by us unknowingly. 2. A reflex action is a sudden and autonomic response to a stimulus which is not under the voluntary control of the brain  (involuntary).
3. Example- Digestion and respiration. 3. Example- Sneezing and Coughing.

Updated on: 06-Jan-2023

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