This figure shows an example of regulation of hormone secretion by a negative feedback loop. The large box labeled 1 represents the initial stimulus. What endocrine glands are indicated by the letters d and e?
A. d = thalamus, e = anterior pituitary
B. d = hypothalamus, e = thyroid gland
C. d = hypothalamus, e = posterior pituitary
D. d = hypothalamus, e = anterior pituitary
E. d = thalamus, e = posterior pituitary
Answer: D
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