Question

Long Answer Question:
Define reflex action. Explain different components of reflex are ?

Answer 1

• Sometimes, we suddenly withdraw our body part when it comes in contact with objects which are very hot, cold, pointed or animals that are poisonous.
• This entire process of response to the peripheral nerve stimulation, that occurs involuntarily is called reflex action.
• It has the following five components :

1) Receptor - It is a cell/tissue/organ which receives a stimulus.

2) Sensory/Afferent Nerve Fibres - These take the sensory impulses generated by the receptor to the central nervous system.

3) Part of Central Nervous System - It may be spinal cord or brain.

4) Motor/ Efferent Nerve Fibres - These carry the motor impulse generated in the CNS to specific effectors.

5) Effector Organ - It may be an organ/ muscle/ gland which on being activated by a motor impulse help to deal with the stimulus.