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Diurnal rhythm of our body is maintained...

Diurnal rhythm of our body is maintained by

A

thyroid gland

B

pineal gland

C

pituitary gland

D

Hypothalamus

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Diurnal Rhythm**: The diurnal rhythm refers to the natural cycle of sleep and wakefulness that occurs over a 24-hour period. It is influenced by various physiological processes in the body. 2. **Identifying the Hormone Involved**: The key hormone that regulates the diurnal rhythm is melatonin. This hormone plays a crucial role in signaling the body when it is time to sleep and when it is time to wake up. 3. **Source of Melatonin**: Melatonin is secreted by the pineal gland, which is a small gland located in the brain. This gland responds to light and darkness, influencing melatonin production. 4. **Mechanism of Action**: During periods of darkness, the secretion of melatonin increases, promoting sleepiness. Conversely, during daylight, melatonin levels decrease, leading to wakefulness. 5. **Conclusion**: Therefore, the diurnal rhythm of our body is maintained by the pineal gland through the secretion of melatonin. **Final Answer**: The diurnal rhythm of our body is maintained by the pineal gland (Option B). ---
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