Multiple choice

Thyroxin is secreted from the thyroid gland _____.

  1. periodically

  2. seasonally

  3. continuously

  4. at puberty only
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The thyroid gland secretes thyroxine continuously, not in bursts or periodically. This continuous secretion maintains steady metabolic control. Seasonal secretion or puberty-only secretion would cause metabolic fluctuations.

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