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ture.com/oourses/10861/quizzes/40670/take HY1 Quizzes> Online Homework 1 Online Homework 1 Started: Jan 25 at 11:22am Quiz Instructions D Question 1 1 pts The hormone thyroxine is released in response to a pituitary hormone called thyroid stimulating hormone (TSHI, As thyroxine levels increase of TSH by the pituitary gland. What effect will this have on the release of TSH? HTML Editor . ® 0Vi@ V [-TTe 12pt Paragraph It causes a decrease in the release of thyroid hormone from the thyroid gland, which maintains homeostasis p span D Question 2

Explanation / Answer

Hypothalamus, pituitary and thyroid gland all lies in a axis.Thyroid releasing hormone(TRH) stimulates Thyroid stimulating hormone (TSH) of pituitary which stimulates thyroid hormone(thyroxine).

Increased concentration of thyroid hormone thyroxine in blood inhibits both TRH and TSH which causes shutdown of thyroid epithelial cells.Further as blood level of thyroxine becomes normal negative feedback signal is lost and system resumes as it was earlier.

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