Answer:
b. each receptor type exhibits receptor specificity.
Explanation:
A taste receptor is a kind of receptor which facilitates tastes in our mouth. The tongue contains a cluster of receptor cells called the taste buds which mediates the taste to our brain. Mainly these taste receptors are of four types.
When we eat food, the chemicals in the food or the food molecules dissolves with saliva present in the mouth and bound to the taste receptors in our mouth.
Each taste receptor in our tongue has its own quality of belonging to a particular subject. In other words, it has its own receptor specificity. So they are not sensitive to pressure or photons.
Hence the answer is ---
b. each receptor type exhibits receptor specificity.
