__________ receptors detect presence of acids in substances, whereas __________ receptors detect sodium in substances.
Answer
A
Sour . . . salt
B
Sweet . . . bitter
C
Bitter . . . salt
D
Sweet . . . sour
Explanation
Sour taste receptors respond to acids, while salt taste receptors respond to sodium ions in substances. Therefore, the correct choice is “Sour . . . salt.”
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