Name & describe the six essential activities of the digestive tract

4. cd

catabolic breakdown

2. md

chewing, mixing, churning food in mouth

6. de

defecation

what is absorption?

movement of nutrients

what is the role of enzymes in chemical digestion?

polysaccharides turned into monosaccharides proteins turned into amino acids fats turned into glycerol and fatty acids

where does absorption occur in digestion?

GI tract to blood or lymph - intestines

5. ab

absorption

what is involved in churning food for mechanical digestion?

digestive juices (- chyme in stomach and small intestine

what is defaction

elimination of indigestible solid wastes.

1 . in

ingestion

what is the purpose of the digestive system?

it acts as a disassembly line nutrients become more available to the body in each step.

What is the role of hydrolysis reactions in chemical digestion?

macromolecules turned into monomers

what is catabolic breakdown?

smaller bits - absorbed. hydrolysis reactions enzymes from saliva, stomach, pancreas and intestines

3. pr

swallowing & peristalsis

what is ingestion

taking food into the digestive tract

what is peristalsis?

waves of contraction and relaxation of muscles in the organ walls