BIO NMDCAT Receptors

nmdcat.online July 7, 2026

In the gustatory system, bitter taste receptors are primarily activated by

A. Hydrogen ions

B. Metal ions

C. Alkaloids and nitrogenous organic compounds

✓

D. Simple carbohydrates

📝 Explanation

Bitter taste evolved as a protective mechanism against ingesting plant toxins, which are frequently alkaloids (like quinine, caffeine, and nicotine) or other nitrogenous compounds.

📖 Additional Information

Hydrogen ions
Metal ions
Alkaloids and nitrogenous organic compounds
Simple carbohydrates

Bitter taste evolved as a protective mechanism against ingesting plant toxins, which are frequently alkaloids (like quinine, caffeine, and nicotine) or other nitrogenous compounds.

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