Question

1.
a) what do you mean by tooth decay??? explain its process.
b) how does food moves in opposite direction during vomiting ???​

Answer 1

Answer:when the small food particles are left in our tooth ,then the bacteria which is present in our mouth oxidise these food and releases acid which causes tooth decay. AND the pH of that ACID is  below 5.5.

Explanation:

Answer 2

Answer:

A) Tooth decay is the softening of your tooth enamel and refers to the damage of the structure of the tooth caused by acids that are created when plaque bacteria break down sugar in your mouth. If this loss of mineral from the enamel is left untreated, a cavity, or hole in the tooth, can eventually occur.

B) It usually occurs as a precursor to vomiting. Local irritation of the stomach, such as bacteria or food poisoning, activates the emetic center of the brain which in turn signals an imminent vomiting reflex. Food then moves in the opposite direction, often from the duodenum into the stomach.