Multiple choice

The taste receptor molecules are found on the top of the microvilli of the taste cells. Which of the following tastes opens voltage-regulated Ca2+ gates, which ultimately helps in releasing the concern neurotransmitter?

  1. Umami

  2. Sweet

  3. Bitter

  4. Sour

  5. Salt
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The simplest receptor found in the mouth is the salt (NaCl) receptor. An ion channel in the taste cell wall allows Na+ ions to enter the cell. This on its own depolarises the cell, and opens voltage-regulated Ca2+ gates, flooding the cell with ions and leading to neurotransmitter release.

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