Question

Which of the following is not a natural reflex action?

• A. Knee-jerk
• B. Blinking of eyes due to strong light
• C. Salivation at the sight of food
• D. Sneezing when any irritant enters the nose

Answer 1

Answer: (C)

Salivation at the sight of food

A few examples of reflex action are:

1.When light acts as a stimulus, the pupil of the eye changes in size.

2.Sudden withdrawal of hand or leg when pricked by a pin.

3.Coughing or sneezing.

4.Knees jerk in response to stamping the leg.

So, the correct option is 'Salivation at the sight of food'.