what is d function of saliva?what is d ph of our body? what is change in body ph after havin food?

Answer 1

Saliva helps to masticate food and adds fluid so swallowing is easier. It contains amylase which begins assisting in chemical break down of starches.

Our body, serum has a pH of 7.40 +/- 0.02. Only under extreme circumstances would our body pH deviate beyond the variance above. Eating would not change it.

Swallowing a whole bottle of aspirin might, though (aspirin is an acid). The kidneys and our respiration system would work very hard to get it back to normal as soon as possible.

Answer 2

Functions of saliva:
The digestive functions of saliva include moistening food, and helping to create a food bolus, so it can be swallowed easily. Saliva contains the enzyme amylase that breaks some starches down into maltose and dextrin. Thus, digestion of food occurs within the mouth, even before food reaches the stomach.

Saliva also has an important protective function, in that it helps prevent against tooth decay and tooth erosion by way of its buffering properties. Tooth decay (or erosion) progresses rapidly when the oral environment becomes acidic (eg. after consuming a soft drink or from bacterial fermentation). Bicarbonate ions contained within saliva will act to neutralize this change in acidity, thus helping maintain a constant pH. Thus, by maintaining optimal pH levels, the rate of demineralisation (loss of tooth structure) is minimized.

Saliva also carries many important ions (Calcium, phosphate, fluoride) that play a role in tooth remineralisation (rebuilding lost tooth structure). The result of this is that, when acid attack occurs on a tooth, there is an equilibrium between demineralization and remineralisation. It is ideal for these two processes to occur at equal rates, however, if demineralization exceeds remineralisation, then loss of tooth structure occurs. For this reason, it is important for salivary funtion to be normal, otherwise an individual carries a higher risk of dental decay.

The importance of the salivary protective function can be demonstrated by considering a scenario where an individual is about to vomit. The vomit contains gastric substances which are extremely acidic and will erode the teeth. A protective reflex occurs. Signals are sent from the brain to the salivary glands (via the involuntary nervous system) to cause increased saliva secretion, even before vomiting occurs. Thus, when vomitting does occur, there is already saliva present in the mouth acting to minimize the acidity and thus prevent destruction of tooth structure.

In addition to this, saliva is responsible for depositing salivary pellicle that covers the entirety of the tooth surfaces. This pellicle is believed to play a role in plaque formation, though there is evidence that it may also act as a protective barrier between acids and the tooth surface.
The pH of our body is around7.42 +/- 0.02 and it does not change significantly.

Answer 3

saliva is secreted by the salivary glands, it contains an enzyme called amylase that breaks down starch in the mouth. However stomach conditions stop this enzyme action.
Your pH of your body can change slightly after eating, but thats what hormones are therefore to maintain a balance of chemicals in the body-Homeostasis.

Answer 4

saliva helps in the digestive process pH of the body is normally 7.35-7.45 there is relatively no change in the pH in our bodies due to buffer systems which maintain the pH level in our body other wise a too low pH can cause acidosis and kill us for instance the buffer systems are shown at work when we drink soda-acidic we can drink lots of soda without a change in pH due to buffer systems

Answer 5

Saliva lubricates the food to make it easier to swallow. It also has enzymes that begin the breakdown of carbohaydrates.

Answer 6

You need to read your text book, which I am sure has the answers to these questions.

Hint: imagine trying to eat without saliva in your mouth.

Answer 7

Sliva is the lubricant & its the initial step to initiate digestion as it has certain enzymes.

pH of the body is 7.2-7.4 (neutral).

depends on the food being used.