The sour sensitive taste buds are located along the sides of the tongue. The bitter sensitive taste buds are located at the rear of the tongue. There are other tastes that are sensitive to more than one type of taste bud. Taste can be enhanced by aromas and vice versa. A fruit flavor will taste better if there is a presence of sugar.
Some salt is needed for meat to taste right.
Sensations are not to be confused with taste. Mint has a coolness, heat from hot pepper, and certain pungent types are not taste but sensations. There are certain taste buds located in the back of the throat and on the palate. The amount of taste buds per square inch will have a direct correlation to the ability to taste. Therefore there are people that are low tasters while others are supertasters.