Question

Which of the following is an example of negative feedback loop in humans?

(a) secretion of tears after falling of sand particles into the eye

(b) salivation of mouth at the sight of delicious food

(c) secretion of sweat glands and constriction of skin blood vessels when it is too hot

(d) constriction of skin blood vessels and contraction of skeletal muscles when it is too cold.

Answer 1

(d) constriction of skin blood vessels and contraction of skeletal muscles when it is too cold.

Negative feedback is a kind of remarks in which the device responds in an contrary direction to the perturbation. it's miles a method of feeding again to the enter part of a gadget’s output, with the intention to opposite the direction of alternate of the output. This has a tendency to preserve the output from changing, so it's miles stabilizing and attempts to preserve regular situations.

This regularly results in equilibrium (in physical technology) or homeostasis (in biology) such that the system will go back to its authentic setpoint routinely. Examples of the use of negative remarks to govern its system are: thermostat manipulate, section-locked loop, hormonal regulation, and temperature regulation in animals.