Some help please. I have to describe the digestion of a turkey sandwich with all the biochemical pathways...?

Question

I have a very heavily weighted question for my bio-chem class. We have to discribe the pathways of digestion on a cellular leavel. For example glycolisis....any help would be AWSOME.

Answer 1

Digestion starts in the mouth. Mechanical breaking of food in smaller pieces and mixed with saliva.This increases surface area for enzyme action.
Saliva contains the first digestive enzyme, amylase. This will start hydrolysing starch into smaller chains by breaking the 1,4 glycosidic bonds between a-glucose molecules.Food does not remain long enough in the mouth ,therefore chemical digestion is limited.
The food is swallowed and reaches the stomach.Hydrochloric acid is secreted which activates pepsinogen into the active form ,pepsin. This enzyme is a protease and will start hydrolysing proteins into smaller polypeptide chains.
Some of the micture is then allowed to enter the duodenum( first 20cm of the small instestine) where sodium hydrogen carbonate is secreted from the pancreas and neutrializes the acid. Also pancreas secrets pancreatic juice containing trypsin(protease),amylase,maltase,lactase and sucrase(all of which are carbohydrases)
Trypsin will break all the polypeptides into amino acids by hydrolyzing the peptide bonds and the amylase and maltase will break all starch down to glucose molecules.
In the ileum all the products are absorbed.

Answer 2

First identify the main nutrients in a turkey sandwich.

Carbohydrates

Proteins

Vitamins and Minerals (Negligible)

Fibre

Now, write down the digestion pathway for each.

Answer 3

hi Butter, Sandwich sliced bread with mayo,slightly pepper,sliced ripe tomato off your vine,a clean sliced cucumber clean out of your backyard and a solid skinny slice of cheese with crisp lettuce on suitable positioned the appropriate layer on bread on then decrease and luxuriate in a wholesome sandwich that style sooo solid with a cold one to bathe it down.. Now this is a sandwich..Lol a pal, poppy1