Multiple choice

Secretin is a

  1. hormone but plays no role in digestion

  2. hormone and plays role in digestion

  3. enzyme and plays important role in digestion

  4. enzyme and plays no role in digestion

  5. Both enzyme and hormone, plays role in digestion.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Secretin is a hormone produced by the small intestine in response to acidic chyme. It stimulates the pancreas to release bicarbonate-rich secretions to neutralize stomach acid. While it aids digestion, it is not an enzyme itself - enzymes are biological catalysts, whereas hormones are signaling molecules.

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