Generated by claude-sonnet-4-6 · 2026-06-15 06:50 · grounding rag
Model Answer
(D) Hypothalamus and Pineal
Both the hypothalamus and the pineal gland are endocrine glands located within the human brain.
Source: Chapter 6, Section 6.3 – Hormones in Animals
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Explanation
- Pituitary is attached to the base of the brain (not inside brain tissue itself); parathyroid and thymus are located in the neck/chest — all outside the brain.
- Hypothalamus is a brain region that releases regulatory hormones; pineal gland is embedded in the brain and secretes melatonin.
- The textbook's Fig. 6.7 and the "Do You Know?" box on hypothalamus confirm both are brain-located endocrine glands, making (D) the correct choice.