Chapter 34, Problem 9TY

Which is true?

1. A loss of taste buds would reduce a person’s sense of smell.
2. Olfactory sensory receptors have a limited lifetime and can’t be replaced.
3. Chemoreception only occurs in terrestrial animals.
4. The relative size of the olfactory bulbs is a good predictor of a mammal’s ability to sense odors.
5. There are a very small number of types of odor receptor proteins in animals.