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High level of TSH can be seen in all conditions except:

Correct answer: D. Low TRF level

  • A. Stress
  • B. Low thyroxin in blood
  • C. Growth and development
  • D. Low TRF level

Explanation

Low TRF level: TRF (Thyrotropin-releasing factor) or TRH (Thyrotropin-releasing hormone) is a hormone produced by the hypothalamus that stimulates the pituitary gland to produce TSH. If TRF levels are low, it could lead to decreased production of TSH.

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About Coordination and Control

Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.

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