Absorbtion Process

test test check 1 2 3. are you guys there? still following us? if you do, leave some comments people! we don't want to do all the talk. we need two ways communication guys.......for those who have comments in our previous posts, we thanked you so much! for those who not, we still love you!

so our previous post is about digestion process right? what an interesting topic! (for us at least)  don't you guys agree that our digestive system is the best? just imagine how they work to breakdown all the foods we ate into small small molecules and ABSORBS all the nutrients they could obtain from the foods. wait a minute, did i mention absorbs? but from where to where? how it happened? why and why? (okay, we think we are being to dramatic here) 

well today we are going to share about the ABSORBTIONS PROCESS

Absorption is the movement of molecules across the gastrointestinal (GI) tract into the circulatory system.

Most of the end-products of digestion, along with vitamins, minerals, and water, are absorbed in the small intestinal lumen by four mechanisms for absorption:

(1) active transport (requires energy)

(2) passive diffusion

(3) endocytosis

(4) facilitative diffusion

KEEPS YOURSELF TOGETHER, NO YAWNING IS ALLOWED.

Nutrient absorption is efficient because the GI tract is folded with several surfaces for absorption and these surfaces are lined with villi (hair-like projections) and microvilli cells. Efficient absorption can be compromised due to lactose intolerance.

Lactose intolerance is not uncommon in the world, affecting about 25 percent of the U.S. population and 75 percent of the worldwide population. It is usually due to the lack or absence of the enzyme lactase, which breaks down milk sugar. Lactose intolerance is not a food allergy. Food allergies are serious, even life threatening, but most people with lactose intolerance can digest small amounts of milk, especially in yogurt and cheese.

Protein, carbohydrate, lipid, and most vitamin absorption occur in the small intestine. Once proteins are broken down by proteases they are absorbed as dipeptides, tripeptides, and individual amino acids. Carbohydrates, including both sugar and starch molecules, are broken down by enzymes in the intestine to disaccharides called sucrose, lactose, and maltose, and then finally into the end-products known as glucose, fructose, and galactose, which are absorbed mostly by active transport. Lipase, an enzyme in the pancreas and the small intestine, and bile from the liver, break down lipids into fatty acids and monglycerides; these end-products then are absorbed through villi cells as triglycerides.

Alcohol is not a nutrient, but 80 percent of consumed alcohol is absorbed in the small intestine. The other 20 percent is absorbed into the stomach. Alcohol is absorbed by simple diffusion, which explains why gastric ulcers(sore that inside of the stomach lining or the upper part of the small intestine) are not uncommon in people who drink excessively.

ENOUGH for today. we afraid if we continue, you guys might thrown up. and its not good for your digestive system. LOL. stay tune for our upcoming post okay?