A、To see how certain chemicals produce different flavors. B、To determine if a person can distinguish salty and sweet solutions.

M: Have you done the lab for physiology yet—the one on taste?
W: Yeah, it was kind of fun—mapping the taste buds. Didn’t you think so?
M: I’m doing it this afternoon. How long will it take?
W: It went pretty quickly—under an hour, anyway. See first you mix up the four solutions.
M: You take water and add either sugar, lemon juice, salt, or—oh—What was it?
W: Bitter quinine.
M: That’s it—oh—then what?
W: Then all you have to do is taste each sample and describe where each flavor seems most intense.
M: Ns that hard?
W: Not really. One thing to remember though—not all the taste buds are on file tongue.
M: Right. I’ll keep that in mind. And thanks for going over this with me. Maybe we could talk about this after I’ve tried it—we could get a pizza or something.
W: Great, give me a call.