Describe the process of starch digestion specifying sites glands enzymes used and n products produced
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It comes under the digestion of carbohydrates in the oral cavity (as the digestion begins from the first stage) through the action of saliva:
In the oral cavity, the food is originally mixed with saliva in order to breakdown the starch present in it by using an enzyme called salivary amylase (known as ptyalin) which converts starten into maltose, isomaltose (contains iso- group) and small dextrins called alpha-dextrins. A total about of which 30% of starch is hydrolysed in the oral cavity. Lysozyme present in the saliva acts as an antibacterial enzyme.
Starch in the presence of salivary amylase at a preferred pH of 6.8 gives maltose + Isomaltose + alpha-dextrin
The biocarbinate ions in the saliva neutralise the acid she present in the food. The thiocyanate ions of saliva acts as a antimicrobial agent and does prevent the infection of microbes that often enter along with food. Mucus of the saliva moistens and dissolves some of the foods and lubricates them efficiently for the food pipe or oesophagus.
The salivary amylase are also present in the saliva of many major known herbivorous mammals like cows and buffaloes and predatory carnivorous mammals like lions and tigers. However, saliva of pigs contain salivary amylase (an exception from those).
The gastric juice also contains only small traces or amounts of gastric amylase but its action is inhibited by the highly acidic condition and the nature of stomach itself.
In the oral cavity, the food is originally mixed with saliva in order to breakdown the starch present in it by using an enzyme called salivary amylase (known as ptyalin) which converts starten into maltose, isomaltose (contains iso- group) and small dextrins called alpha-dextrins. A total about of which 30% of starch is hydrolysed in the oral cavity. Lysozyme present in the saliva acts as an antibacterial enzyme.
Starch in the presence of salivary amylase at a preferred pH of 6.8 gives maltose + Isomaltose + alpha-dextrin
The biocarbinate ions in the saliva neutralise the acid she present in the food. The thiocyanate ions of saliva acts as a antimicrobial agent and does prevent the infection of microbes that often enter along with food. Mucus of the saliva moistens and dissolves some of the foods and lubricates them efficiently for the food pipe or oesophagus.
The salivary amylase are also present in the saliva of many major known herbivorous mammals like cows and buffaloes and predatory carnivorous mammals like lions and tigers. However, saliva of pigs contain salivary amylase (an exception from those).
The gastric juice also contains only small traces or amounts of gastric amylase but its action is inhibited by the highly acidic condition and the nature of stomach itself.
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