Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
12 Cards in this Set
- Front
- Back
Absorption of lipids |
Glycerol and short/med chain FA diffuse into intestinal cells - blood stream Larger molecules merge with bile to crest micelles soluble in watery digestive fluid transported into intestinal cells Packed with protein to become chylomicrons into lymph - blood via heart |
|
Transport of lipids |
Very low density lipoproteins - composed primarily triglycerides - deliver to cells Low density lipoproteins - composed primarily of cholesterol High density lipoproteins - composed primarily of protein collect from blood bring back to liver |
|
Lipid metabolism |
Conversion of food fat to body fat 60% of energy requirement for body at rest 1kg fat provides 30000kj Requires carbs and protein for breakdown of fat |
|
Food influencing protein requirements |
Body size Protein quality Energy intake adequacy New tissue requirement Development muscle mass Trauma stress infection Amino acid antagonism |
|
What is proteins |
20 different amino acids 9 of which are essential Each amino acid has a group a hydrogen atom and side group |
|
Amino acid chains are linked by peptide bonds what are the names of these |
Dipeptide = 2 AA bond together Tripeptide = 3 bond together |
|
Digestion of protein |
Stomach - partial breakdown of protein - makes pepsin Small intestine further hydrolysis of entering polypeptides |
|
Proteins in the body |
Protein is constantly being broken down and synthesised in the body Denatured by head and acid Determined by genetic info and unique to individuals |
|
Protein synthesis |
The instruction for making every protein in a persons body are transmitted by way of the genetic information received at conception |
|
Roles of proteins in the body |
Hormones - regulate body processes and some hormones are proteins - insulin and glucagon Building materials for growth and maintenance - colleges filled with minerals - strength bonds and teeth, tissues including skin, hair, nails Enzymes Regulators of fluid balance - plasma attract water Prevent or oedema Antibodies Acid base regulators Transporters - carry lipids, vitamins, minerals and oxygen
|
|
Enzymes |
Proteins that facilitate anabolic and catabolic chemical reactions Enzymes don’t participate and aren’t changed by reaction |
|
Ammonia |
Toxic to the body Liver combines with carbon dioxide = urea Urea cleared from blood by kidneys Adequate fluids required to remove urea from blood |