The pituitary gland is called the master gland because it
- A. is the largest endocrine gland
- B. sits outside the brain
- C. secretes digestive enzymes
- D. controls the secretion of several other endocrine glands
Explanation
Pituitary hormones such as TSH and ACTH direct the thyroid and adrenal cortex, and its link with the hypothalamus places it at the top of many control chains. Size is irrelevant; control is what earns the title.
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