Multiple choice

Example of negative feedback loop in animals is

  1. salivation of mouth at the sight of food

  2. secretion of sweat gland and constriction of skin blood vessels when it is too hot

  3. secretion of tears after any dust particle falls into the eye

  4. constriction of skin, blood vessels and skeletal muscles when it is too cold

  5. closing of eyelid on sudden exposure to intense light
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Negative feedback occurs when the result of a process influences the operation of the process itself in such a way so as to reduce changes. Negative feedback tends to make a system self-regulating, i.e. it can produce stability and reduce the effect of fluctuations. Negative feedback loops where just the right amount of correction is applied in the most timely manner. It can be very stable, accurate and responsive.

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