Question

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.

Answer 1

Olfactory receptors have a high degree of specificity toward a single type of chemical.

Step-by-step explanation:

The correct statement about olfaction is b) Olfactory receptors have a high degree of specificity toward a single type of chemical.

Each olfactory sensory neuron has only one type of receptor on its cilia, and the receptors are specialized to detect specific odorants. Humans have about 12 million olfactory receptors, distributed among hundreds of different receptor types that respond to different odors.

For example, each receptor may respond to a specific chemical, such as the scent of roses or the smell of coffee, but not to other chemicals. This specificity allows us to distinguish between different odors.

Answer 2

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

Step-by-step 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.