thyroid

Question 1

by which mechanism is the hypothalamo-pituitary-thyroid axis controlled

Answer 1

negative feedback

Question 2

what do T3 and T4 have direct negative feedback over

Answer 2

thyrotroph cell in anterior pituitary by reducing TSH release

Question 3

what do T3 and T4 have indirect negative feedback over

Answer 3

hypothalamus by reducing TRH release

Question 4

what effect does iodide have on the thyroid (Wolff-Chaikoff effect)

Answer 4

suppresses release of T3 and T4

Question 5

what do oestrogens do to TSH release in anterior pituitary

Answer 5

stimulate

Question 6

what do glucocorticoids do to TSH release in anteror pituitary

Answer 6

suppress

Question 7

diagram of hypothalamo-pituitary-thyroid axis

Answer 7

diagram