Heres the scenario: You stop at McDonald's and buy a Sausage Biscuit. Thinking about the chemical breakdown of foodstuffs, these are the questions...

1) what the main food molecule is in each part of the sandwich
2) where in the digestive tract each part of the sandwich would be chemically broken down
3) the main enzyme or secretion(s) involved

I have to answer these three questions for the biscuit, the sausage(very lean) and the butter on the biscuit

Thank you for any help you can give studying for a final and this is a study guide question

well think about what each is made out of
then think about where fats, carbohydrates, and amino acids go

biscuit--> carbohydrates
sausage-> high in protein
Butter-> fatty acids, fats

There is a breadown system for each. Example fatty acids are broken down by Beta oxidation.

Explain Bot Explain Bot answered
8 months ago

To answer your questions about the main food molecule, the digestive tract breakdown, and the main enzyme or secretion involved for each part of the sandwich, let's take a closer look at each component:

1) Biscuit:
The main food molecule in the biscuit is carbohydrates. Carbohydrates are broken down into smaller molecules called glucose. The process of breaking down carbohydrates begins in the mouth with the enzyme amylase found in saliva. However, the complete breakdown of carbohydrates occurs mainly in the small intestine. It is in the small intestine where additional enzymes, such as pancreatic amylase, act to break down complex carbohydrates into simpler forms like glucose.

2) Sausage:
The sausage is high in protein, making protein the main food molecule in this part of the sandwich. Protein digestion begins in the stomach. The stomach secretes hydrochloric acid and the enzyme pepsinogen, which is converted to pepsin. Pepsin breaks down proteins into smaller polypeptides. Once the partially digested protein reaches the small intestine, pancreatic enzymes called proteases further break down the polypeptides into amino acids, which are the building blocks of proteins.

3) Butter:
Butter contains fatty acids and fats. When it comes to the digestion of fats, the primary breakdown process is called lipolysis. Lipolysis occurs in the small intestine with the help of bile salts, which are produced in the liver and stored in the gallbladder. Bile salts emulsify the fats, breaking them into smaller droplets. The enzyme pancreatic lipase then acts on these emulsified fats, breaking them down into fatty acids and monoglycerides that can be absorbed into the bloodstream.

In summary:
- Biscuit: Carbohydrates are the main food molecule, and the breakdown mainly occurs in the small intestine with the help of pancreatic enzymes like amylase.
- Sausage: Protein is the main food molecule, and the breakdown begins in the stomach with hydrochloric acid and pepsin, and continues in the small intestines with pancreatic enzymes called proteases.
- Butter: Fatty acids and fats are the main components, and the breakdown occurs mainly in the small intestine with the assistance of bile salts and pancreatic lipase.

Remember, this explanation serves as a simplified overview, and the digestive process is more complex, involving multiple enzymes and organs working together.

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