African naked mole rats show no behavioral response when exposed to capsaicin, the active ingredient in chili peppers. This is most likely due to the fact that they lack the neurotransmitter
A) glutamate.
B) GABA .
C) substance P.
D) serotonin.
Answer: C
Rationale: Substance P is a neurotransmitter involved in the experience of pain, including the pain caused by capsaicin. African naked mole rat lacks substance P, and therefore does not appear to experience pain when it comes into contact with a stimulus such as capsaicin.
Psychology
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