Question

exam lesson name: introduction to human anatomy and physiology
exam number: (partial)

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question 20 of 20 :
select the best answer for the question.

1. which ion/molecule in the saliva allows you to taste sugar as sweet?

a. hydrogen ions
b. glucose
c. sodium ions
d. alkaloid molecules
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Explanation:

To determine the ion/molecule in saliva that allows tasting sugar as sweet, we analyze each option:

• Option A: Hydrogen ions are related to acidity (taste of sour), not sweet.
• Option B: Glucose is a sugar, but the question is about what in saliva enables tasting sugar as sweet. Sodium ions in saliva interact with sweet - tasting molecules (like sugars) to initiate the taste perception of sweetness.
• Option C: Sodium ions in saliva play a role in the perception of sweet taste by interacting with sweet - tasting substances, allowing us to perceive sugar as sweet.
• Option D: Alkaloid molecules are not related to the perception of sweet taste from sugar.

Answer:

C. Sodium ions