6.1 Digestion and absorption
Terms in this set (37)
The shortening of a muscle fibre
Muscles found in the lining of the digestive tract that at 90 degrees to the direction of peristalsis. When they contract they narrow the lumen.
Muscles found in the lining of the digestive tract that run in parallel to the direction of peristalsis. When they contract they shorten the length of the tract.
The hollow space in the middle of a tube.
Large, complex and insoluable molecules also know as polymers.
The simple, soluable building blocks from which macromolecules are made.
The breaking down of macromolecules into monomers via physical and chemical means.
The uptake of the products of digestion into the bloodstream.
The tube that connects the mouth and the stomach.
A large bag at the churns swallowed food. Contains acid which kills bacteria and denatures proteins. Protein digestion begins here.
Narrow tube after the stomach where enzymes from the pancreas are added and digestion is completed.
The site of absorption.
Part of the large intestine. Water is absorbed here and faeces are formed.
Where faeces are stored prior to egestion.
The duodenum, Illeum and jejunum
The colon and the rectum.
The site of egestion.
The removal of undigested food from the body.
The use of the products of digestion within cells.
An organ that produces enzymes and secretes them into the duodenum via the pancreatic duct.
An organ that produces bile for use in the duodenum
Bile is stored here before being passed to the pancreatic duct
A wave of contraction of the longitudinal and circular muscles that moves along the digestive tract.
A compound that lowers the surface tension of a liquid
The outer layer of the digestive tract
A layer of connective tissue found between the muscle layer and mucosa that supports the mucosa.
The inner lining of the digestive tract. Also called a mucus membrane.
A enzyme that breaks down starch into maltose
An enzyme that breaks down phospholipids and triglycerides into fatty acids and glycerol.
An enzyme that breaks down proteins into amino acids
An enzyme that breaks down nucleic acids into nucleotides
An enzyme that breaks down maltose into two glucose molecules.
An enzyme that breaks down lactose into glucose and galactose
An enzyme that breaks down sucrose into fructose and glucose
Finger-like projections that increase the surface area for absorption in the illeum.
An enzyme that breaks down the alpha 1,6 glycosidic bond in amylopectin and glycogen
Catabolic reactions that break down substrates into small molecules