Question

multiple choice question
olfactory receptors are ______.
photoreceptors
mechanoreceptors
chemoreceptors
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Explanation:

Olfactory receptors detect odor - molecules which are chemicals. Chemoreceptors are sensory receptors that detect chemical stimuli. Photoreceptors detect light and mechanoreceptors detect mechanical stimuli like touch, pressure. So olfactory receptors are chemoreceptors.

Answer:

O chemoreceptors