Question
Class 10Biology

(a) What is reflex action? Give its two examples. Illustrate the pathway followed by a message from the

receptor in a reflex arc.

(b) Name the actions of sympathetic and parasympathetic systems on eye.

Verified Answer

(a) Reflex Action: It is an automatic, spontaneous nerve mediated response to a stimulus without consulting the will of the individual.

e.g., withdrawal of hand on being pricked or coming in contact with hot surface.

(b) Effect on Pupil,

  • Sympathetic - dilation
  • Parasympathetic - constriction.