the procee of digestion in stomach?

Answer 1

In the stomach, food undergoes chemical and mechanical digestion. Here, peristaltic contractions (mechanical digestion) churn the bolus, which mixes with strong digestive juices that the stomach lining cells secrete (chemical digestion). The stomach walls contain three layers of smooth muscle arranged in longitudinal, circular, and oblique (diagonal) rows. These muscles allow the stomach to squeeze and churn the food during mechanical digestion.

Powerful hydrochloric acid in the stomach helps break down the bolus into a liquid called chyme. A thick mucus layer that lines the stomach walls prevents the stomach from digesting itself. When mucus is limited, an ulcer (erosion of tissue) may form.

Food is digested in the stomach for several hours. During this time, a stomach enzyme called pepsin breaks down most of the protein in the food. Next, the chyme is slowly transported from the pylorus (end portion of the stomach) through a sphincter and into the small intestine where further digestion and nutrient absorption occurs.

Answer 2

The process of digestion in the stomach commences upon the entry of the bolus into the pyloric region of the stomach. Firstly, there is a change in pH from alkaline pH (Enzymes such as Salivary amylase in saliva are alkaline). The bolus is acted upon by the HCl produced by the oxyntic cells of the walls of the stomach. Formation of HCl in the oxyntic cells is explained by the Hamberger's phenomenon. The bolus is converted into a whitish, milky semisolid consistency, known as the chyme. The mixing of the chyme is facilitated by the weak peristaltic waves of the walls of the stomach. This is followed by the action of enzymes such as pepsin, which are proteolytic in nature and break down the complex polypeptides into simpler polypeptides and peptones. Gastric lipase acts upon the lipid component of the bolus and emulsifies it. The carbohydrate digestion is also carried out in the stomach, but to a lesser extent. They are broken down into simpler oligosaccharide units, which are further broken down into the component moonosaccharides in the intestine. After the process of digestion in the stomach, the food is pushed further into the duodenum by weak peristaltic waves of the stomach walls.

Answer 3

digestion

Process of dissolving and chemically converting food for absorption by cells. In the mouth, food is chewed, mixed with saliva, which begins to break down starches, and kneaded by the tongue into a ball for swallowing. Peristalsis propels it through the esophagus and the rest of the alimentary canal. In the stomach, food mixes with acid and enzymes, which further break it down. The mixture, called chyme, enters the duodenum, the first part of the small intestine. Bile from the liver breaks up fat globules. Enzymes from the pancreas and intestinal glands act on specific molecules, breaking carbohydrates down into simple sugars, proteins into amino acids, and fats into glycerol and fatty acids. These products are absorbed by the bloodstream. Indigestible substances, such as fibre, pass into the large intestine, where water and ions are reabsorbed and feces held for excretion.

Answer 4

As soon as food enters into the stomach Hcl acid acts on it neutralizing the alkaline nature of food.the gastric glands found in the wall of stomach secrete gastric juice which contain three enzymes pepsin, renin, and lipase. pepsin acts on proteins converting into peptones, renin act on milk making to curds and lipase acts on fats convertin it into fatty acid and glcerol.this complete process takes about 4 hours after the pyloric sphincter opens allow this digested food into the small intestines.

Answer 5

http://en.wikipedia.org/wiki/Digestion

I don't know the details myself but that article will help.

Answer 6

do not know