Why does my mouth water when I think of lemon?

Question

Whenever I think of sucking onto lemon, my mouth instantly waters!

Why is this so? This happens when I think of salt and vinegar chips also.

Does this have anything to do with pH levels?!

Answer 1

For sensory nerve system

Answer 2

Nothing to do with pH levels. Your body is trained to produce saliva when you eat. Saliva helps break down starches before they reach your stomach, and lubricate your osophogas (throat).

You start to salivate when you see something that you want to eat, or even think about something yummy.

Read about Pavlov's dogs.

Answer 3

This has nothing to do with pH levels.This is a conditioned reflex action .A conditioned reflex action is a reflex action acquired from past experience or learning.First when you had not tasted lemons thinking of lemons caused no watering of the mouth.But when you tasted them you came to know they are sweet and sour an so you started liking lemons >Now you like lemons so when you will see a lemon  your mouth will start watering.Your mouth will also start watering even when anyone will mention the word lemons in front of you. This is true.You may try it. You will have to read about Pavlov's experiments with dogs if you want to know in detail what happens.

Answer 4

because lemons are a citrus fruit there for are acidic and our brains are programed to make our mouth go watery e.g saliva to combact the rise in acidity when we eat a lemon.  Much like when we are thirsty our brain tell us our mouth is dry and we need water.  Hope this was of some help