CHAPTER4 (TOPIC2) Flashcards
(30 cards)
is the process where the body breaks down food into smaller molecules, primarily carbohydrates, proteins, and fats, so they can be absorbed and used for energy, growth, and repair.
Nutrient digestion
Small nutrient molecules of Carbohydrates, Proteins, Fats
Monosaccharides
Amino acids
Triglycerides
are foods rich in sugars also called Saccharides.
(Corn, Wheat, Rice bran)
Carbohydrates
Many sugars are linked together (Cellulose, Starch,
Glycogen)
Polysaccharides
- Two sugars are linked together (Sucrose, maltose, lactose)
Disaccharides
- Single sugars (Glucose, Fructose, Galactose)
Monosaccharides
are the simplest form of carbohydrates and are composed of a single molecule or subunit.
Monosaccharides
The digestion starts in the Mouth. Through the action of ______ ______.
Salivary Amylase
act to further breakdown the sugar from Polysaccharides to Disaccharides.
Pancreatic Amylase
Monosaccharides are absorbed by the _____ to use as energy.
Liver
is a primary energy source for the body.
Glucose
Disaccharides that also converted into Glucose in the liver.
Fructose and Galactose
are large molecules comprised of Amino Acid
Proteins
are linked together by a peptide bond to create a polypeptide chain.
Amino acid
Protein Digestion starts in the ________.
Stomach
in the stomach releases an enzyme called Pepsinogen which is an inactive enzyme.
Chief cell
cells of the stomach that releases Hydrochloric Acid
(HCL).
Parietal cells
functions as a proteolytic enzyme, breaking down proteins into smaller peptides and amino acids in the acidic environment of the stomach
Pepsin
is an endopeptidase, meaning it breaks down proteins from within the chain, rather than from the ends.
Pepsin
An enzyme called ________ released by the duodenal epithelial cells (cells lining the duodenum)
Enteropeptidase
An enzyme called enteropeptidase released by the ______ ______ ____ (cells lining the duodenum)
Duodenal Epithelial Cells (DECs)
only act on a specific end of a fragment breaking the bond and releasing amino acid at a time.
Carboxypeptidase
which is located in the Intestine also releases enzyme Aminopeptidase and dipeptidase.
Micro villi
An enzyme break the bond between dipeptides
Dipeptidase