When the set point of hypothalamus is disturbed by high temperature, it stimulates vasodilation and sweating while in low temperature there is vasoconstriction and shivering. Related Theory Feedback loops are used extensively to regulate secretion of hormones in the hypothalamic-pituitary axis. An important example of a negative feedback loop is seen in control of thyroid hormone secretion. The thyroid hormones thyroxine and triiodothyronine (" T4 and T3 ") are synthesized and secreted by thyroid glands and affect metabolism throughout the body.
Which of the following is an example of negative feedback loop in humans?
NEET UG 2007 — Zoology Neural Control and Coordination
2007mcqmedium
Which of the following is an example of negative feedback loop in humans?
Official previous-year question
Held on 30 Apr 2007 · Verified 9 Jul 2026.
Options
- 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.
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