Question

Thyroid-stimulating hormone (TSH) secretion is increased 

A. After partial removal of the thyroid gland. 

B. In infants born without a thyroid gland. 

C. When metabolic rate falls. 

D. In starvation. 

E. When the diet is deficient in iodine.

Answer 1

A. True Due to a reduction in pituitary inhibition by circulating thyroxine. 

B. True Due to absence of the normal pituitary inhibition by circulating thyroxine. 

C. False TSH and thyroxine influence metabolic rate, not vice versa. 

D. False The level falls, which tends to conserve energy. 

E. True Due to inadequate manufacture of thyroxine, pituitary inhibition is reduced.