[Campbell Biology P.1066] Refer to the 'Hormone cascade' diagram. Which sequence correctly de... | Practice Question

Refer to the 'Hormone cascade' diagram. Which sequence correctly describes the regulation of thyroid hormone secretion?

  • A: Stimulus → Hypothalamus → TRH → Anterior pituitary → TSH → Thyroid gland → Thyroid hormone → Response
  • B: Stimulus → Thyroid gland → TSH → Anterior pituitary → TRH → Hypothalamus → Thyroid hormone → Response
  • C: Stimulus → Anterior pituitary → TRH → Hypothalamus → TSH → Thyroid gland → Thyroid hormone → Response
  • D: Stimulus → Hypothalamus → TSH → Anterior pituitary → TRH → Thyroid gland → Thyroid hormone → Response

Explanation

The 'Hormone cascade' diagram and accompanying text explicitly show that the hypothalamus releases TRH, which acts on the anterior pituitary to release TSH, and TSH then acts on the thyroid gland to release thyroid hormone.