Answers with Explanation:
1. Broken down into smaller molecules by bile salts.
Lipids - <u>Lipids are considered important when it comes to the structure of living cells.</u> It also aids in the cell's function. Through the process of <em>emulsification,</em> the lipids are broken down into smaller lipid by<em> bile salts.</em>
2. Broken down by enzymes embedded in the cellular membrane of the intestinal wall.
Carbohydrates - Carbohydrates (starches) are broken down into <em>simple sugars by enzymes</em> that are embedded in the cellular membrane of the intestinal wall. Then, it can be absorbed as nutrient in the body. The chemical digestion of starches starts in the<u> mouth.</u>
3. Must first be broken down into smaller units before it can be absorbed into the intestinal wall.
Proteins - Proteins are broken down into smaller units by hydrochloric acid and pepsin. After which, it can now be absorbed into the intestinal wall. Protein digestion starts in the <u>stomach and ends in the small intestine</u>.