Where does digestion of food first start?

Answer 1

Chemical digestion begins in the mouth, when our salivary amylase breaks down starch

(on a-plus) the STOMACH begins digestion of protein by emulsifying food.

i promise you its the right answer.

Answer 2

The stomach. There are recesses in the wall of the stomach called pits. These pits produces pepsinogen and HCl as well are protective mucous. Pepsinogen is the zymogen (inactive form) of pepsin the enxyme which breaks down protein. It is cleaved form the zymogen form into the active form in very low pH situations, this is why HCl is secreted here.
Mouth
The digestion of proteins begin at the stomach.
the stomach
Protein digestion begins in stomach by pepsin and HCl .
Protein digestion in humans begins in the stomach. The enzyme "pepsin" is activated from its' inactive form "pepsinogen" due to the acidic conditions of the stomach.

Pepsin starts digestion of proteins by breaking down the many of polypeptides into shorter peptides.

However, complete chemical digestion will not occur until proteins reach the duodenum and the jejunum of the small intestine.

Here more enzymes come into play (proteases and peptidases) so that the protein is completely broken down into its' smallest building blocks (the monomers called amino acids).
Protein digestion in humans begins in the stomach
In the stomach
The stomach. These pits produces pepsinogen and HCl as well are protective mucous. Pepsinogen is the zymogen (inactive form) of pepsin the enxyme which breaks down protein. Proteins are broken down in the stomach during digestion by enzymes known as proteases into smaller polypeptides to provide amino acids for the organism, including the essential amino acids that the organism cannot biosynthesize itself. ...
It is cleaved form the zymogen form into the active form in very low pH situations, this is why HCl is secreted here.
Protein digestion occurs mainly in the stomach and also in the small intestine.

When protein food is eaten and enters the stomach, the hydrochloric acid in the stomach "denatures" the protein. This means it starts to break the protein down into short chains of amino acids joined together (peptide chains).

This is also when the the hydrochloric acid (HCl) also activates an enzyme called pepsin to participate in the break-down of the protein.

After this, the broken down protein enters into the small intestine where it is further broken down into the di-peptides (2 amino acids joined together) by pancreatic enzymes and then into its individual amino acids by other pancreatic enzymes.

The amino acids are absorbed through the small intestine and travel in the blood stream into the liver.
Protein digestion begins in the stomach. The lining of the stomach produces hydrochloric acid and an enzyme called pepsin which are used in digestion.
Digestion of the proteins begins in the stomach.
stomach
Protein digestion begins in the stomach and continues to be digested in the small intestine.
stomach
Salivary Glands, or if you consider your mouth an organ, it's another. It breaks down fats.
Protein digestion begins in the stomach with exposure to the stomach acid and an enzyme called pepsin. Protein digestion is completed in the small intestine with the addition of enzymes, collectively called peptidases, from the pancreas.
The mouth is where digestion begins. The enzyme that aids in this digestion is called salivary amylase.
the pepsin in the stomach touches the proteins but it mainly digests in the small intestine.
Protein digestion begins in the stomach, chiefly with the action of the hydrochloric acid that is produced there, and by the enzyme called pepsin (PEP-sin). Some seven or more factors influence how fast the enzymes act on the protein. These factors include the concentration of the enzyme, that is, how much of it is present; the amount of protein food needing action; the acidity of the food and of the stomach; the temperature of the food; time; and the presence of any digestion inhibitors, such as antacids. Cooking and chewing help, but protein digestion does not begin in the mouth, as carbohydrate metabolism does. The hydrochloric acid in the stomach is required to break the protein bonds. The protein-containing foods are broken apart, separating out the protein, then the proteins are broken into their constituent parts, the amino acids.

:)
the stomach. hydrochloric acid denatures protein. the enzyme rennin converts caseinogen to casein and the enzyme pepsin converts proteins to peptones.

it then continues in the small intestine where the enzyme trypsin from the pancreas converts peptones to peptides and the enzyme peptidase from the small intestine converts peptides to amino acids ready for absorption into the bloodstream.

Answer 3

Carbohydrate digestion begins in the mouth, and is broken down with the enzymes in saliva. Protein digestion starts in the stomach, and is broken down with pepsin. Fats are digested in the small intestine using bile and other chemicals.

Answer 4

Digestion of food starts in mouth by the enzyme present in saliva. It starts to break starch into smaller molecules. The process continue in the upper part of stomach for some time till the acid in the stomach stops the action of the enzyme.

Answer 5

Digestion of food first starts in the mouth, where chewing and the enzyme salivary amylase begin breaking down carbohydrates.

Answer 6

Yes, the Protein digestion begins in the stomach.

Answer 7

Amylase protein digestion enzymes are produced in Saliva. Digestion continues using hydrochloric (HCl) acid in the stomach.

Answer 8

Protein digestion begins in stomach by pepsin and HCl .

Answer 9

mechanical digestion begins in the mouth

Answer 10

in your pancreas.