NCLEX RN Simulated Exam Test Bank Related

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Which gland of the endocrine system secretes a hormone that assists with the sleep/wake cycle?

  • A. Pituitary
  • B. Pineal
  • C. Pancreas
  • D. Hypothalamus
Correct Answer: B

Rationale: The correct answer is the Pineal gland. The Pineal gland, located in the brain, secretes melatonin, which plays a crucial role in regulating the sleep/wake cycle in response to exposure to light. The Pituitary gland (Choice A) secretes various hormones but not specifically related to the sleep/wake cycle. The Pancreas (Choice C) secretes insulin and digestive enzymes, not hormones related to the sleep/wake cycle. The Hypothalamus (Choice D) is involved in regulating many bodily functions, including hormone secretion, but it does not directly secrete the hormone that regulates the sleep/wake cycle.