Question

The diagram given below shows the internal structure of a spinal cord depicting a phenomenon. Study the diagram and answer the questions.

(i) Name the phenomenon that is depicted in the diagram. Define the phenomenon.

Answer 1

Solution:-

• The given figure shows the phenomenon of reflex action.
• Reflex action is an automatic and involuntary response to a stimulus.
• It is the entire process of response to a peripheral nervous stimulation, that occurs involuntarily, that is, without conscious effort or thought and requires the involvement of a part of the central nervous system(spinal cord).
• Most reflex actions are controlled by the spinal cord through reflex arcs.