Question

Q12. Read the following paragraph carefully and answer the given questions accordingly.

(03 Marks)

Tooth decay starts when the pH of the mouth is lower than 5.5. Tooth enamel, made up of

calcium hydroxyapatite (a crystalline form of calcium phosphate) is the hardest substance in the

body. It does not dissolve in water, but is corroded when the pH in the mouth is below 5.5.

Bacteria present in the mouth produce acids by degradation of sugar and food particles

remaining in the mouth after eating. The best way to prevent this is to clean the mouth after

eating food. Using toothpastes, which are generally basic, for cleaning the teeth can neutralise the

excess acid and prevent tooth decay.

You might have heard that the pH level in the body affects your health. Studies have shown that

lower, or acidic, pH levels are associated with a greater risk of serious health conditions including

type 2 diabetes, heart disease, and obesity. Studies have also shown that higher, or alkaline, pH

levels are linked to improvements in memory and cognition, reduced pain, and lower risk of

hypertension (high blood pressure), and stroke.

Another interesting link is pH levels and bone health. Extensive research has been conducted on

the effects of pH on bone health, and studies have discovered that low-acid diets can help improve

bone density. According to Dr. Sara Gottfried, the Journal of Nutrition published a study that

stated that alkaline mineral waters can decrease bone resorption and even lower parathyroid

hormone levels which regulate the release of calcium from bone.

An alkaline diet is one that incorporates foods that can increase the pH levels. Interestingly, an

alkaline diet is associated with an increase in growth hormone which can burn fat, improve

libido, and retain a general sense of well-being.

Maintaining a good pH balance in the mouth allows a healthy balance of good and bad bacteria.

Many of the good bacteria in our mouth are harmless and some bacteria, known as probiotics,

aid in the digestion of foods. Other good bacteria actually protect our teeth and gums.

Certain foods, such as sugary beverages, snacks, and some grains, increase the acidity in the mouth.

The pH of the mouth can change dramatically with the types of foods we eat. Foods that are highly

acidic, like lemons, lowers the pH, while foods like melons increases the pH.The saliva can help neutralize the acid, but eating acidic foods can increase the acidity of the saliva.

If the pH takes a long time to neutralize in the mouth, it may give bad bacteria enough time to

wreak havoc on the teeth and gums. Typically, it may take a few minutes or a few hours for the pH

to neutralize. An acidic mouth is an optimal environment for bad bacteria to grow, and if given the

time and the ability, it can cause tooth deca. What according to you, could be the reason of not allowing the kids to eat plenty of

chocolates?​

Answer 1

Answer:

Tooth decay is caused by bacteria and other things. ... Over time, the acids made by the bacteria eat away at the tooth enamel, causing ... But the following may raise your child's risk for it:.

Answer 2

Answer:

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