Select the correct statement about olfaction. a) olfactory adaptation is only due to fading of receptor cell response. b) olfactory receptors have a high degree of specificity toward a single type of chemical. c) substances must be volatile and hydrophobic in order to activate olfactory receptors. d) some of the sensation of olfaction is actually one of pain.

Some of the sensation of olfaction is actually one of pain. (Ans D)

Explanation:

Olfactory system is also known as sense of smell, is called the sensory system used for olfaction (smelling). It is known as the special sense, which have directly association with specific organs. Most reptiles, and mammals contains 2 types of olfactory system:

1) Main olfactory system: It helps in detection airborne substances.

2) Accessory olfactory system: It helps in sense fluid phase stimuli.

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