Question

using the letters a - d, list the order of the illustrations from when the chewed - up spaghetti first enters the stomach to when it leaves the stomach.
how would illustrations for the steak be similar or different to the ones for the spaghetti?
go to the \small intestine\ section by selecting the
ext\ button.
the illustrations below represent what happens to the spaghetti in the athletes small intestine out of order.
using the letters a - d, list the order of the illustrations from when the biomolecules in the spaghetti first enter the small intestine to when they leave.
what are the main molecules present in the small intestine when the athlete eats the spaghetti?

Explanation:

When chewed - up spaghetti enters the stomach, it is in larger pieces (represented by larger shapes like circles in the first image). As it is broken down by stomach acids and enzymes, the pieces get smaller. In the small intestine, the biomolecules start being further digested and absorbed. Spaghetti is mainly carbohydrates, so the main molecules in the small intestine are sugars and starches at first, which are further broken down into simple sugars like glucose for absorption. Steak is mainly protein, so its digestion process in the stomach and small intestine involves different enzymes (proteases) to break down proteins into amino - acids, and the illustrations would show different starting and intermediate forms compared to spaghetti.

Answer:

1. Without seeing the specific details of the illustrations clearly, a general order could be that the larger - sized initial pieces (C if it has larger structures) enter first, then as it starts breaking down the pieces get smaller (D), further breakdown occurs (A), and finally it is in a more broken - down state before leaving (B). But this is a very general assumption based on the digestion process.
2. Steak is protein - rich, while spaghetti is carbohydrate - rich. The starting illustrations for steak would show larger protein - containing chunks. In the stomach, proteases would act on steak, breaking it into smaller polypeptides. In the small intestine, peptidases would further break it into amino - acids. The illustrations for steak would have different shapes and sizes of particles compared to spaghetti as the biomolecules and digestion processes are different.
3. Similar to the stomach process, the larger biomolecule - containing structures would enter first (A if it has relatively larger structures), then as digestion progresses the structures get smaller (B), further breakdown occurs (C), and finally it is in a highly broken - down state for absorption (D).
4. The main molecules present in the small intestine when the athlete eats spaghetti are starches (complex carbohydrates) initially, which are broken down into disaccharides like maltose by pancreatic amylase, and then further into monosaccharides like glucose by brush - border enzymes for absorption.