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Table of Contents. Absorption can be defined as the process of assimilating substances across the intestinal epithelial cells or the tissues and organs through the process of active or passive transport. This can be facilitated through diffusion or osmosis and always follows the digestion process and never precedes it.
er molecules for absorption and me-tabolism to occur. Starches and sugars are absorbed as monosaccharides; fats are absorbed as free fatty acids and glycerol (plus a small amount of intact triacylglycerol); proteins are absorbe. as their constituent amino acids and small peptides. The processes of digestio.
Jul 15, 2021 · Absorption Definition and Examples. Absorption occurs when ions, atoms, or molecules pass into a bulky material. These particles (the absorbate) diffuse or dissolve into the absorbent substance. A familiar example is a paper towel picking up water. Eventually, water evenly permeates the paper.
Chemical digestion, on the other hand, is a complex process that reduces food into its chemical building blocks, which are then absorbed to nourish the cells of the body (Figure 23.7.1). In this section, you will look more closely at the processes of chemical digestion and absorption. Figure 23.7.1 – Digestion and Absorption: Digestion begins ...
- Lindsay M. Biga, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Mat...
- 2019
Digestion of food is a form of catabolism, in which the food is broken down into small molecules that the body can absorb and use for energy, growth, and repair. Digestion occurs when food is moved through the digestive system. It begins in the mouth and ends in the small intestine. The final products of digestion are absorbed from the ...
Digestive Secretions and Absorption of Water. Absorption is a complex process, in which nutrients from digested food are harvested. Absorption can occur through five mechanisms: (1) active transport, (2) passive diffusion, (3) facilitated diffusion, (4) co-transport (or secondary active transport), and (5) endocytosis.
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Mechanisms of Absorption. Digestion breaks down food into smaller, soluble molecules. The products of digestion are absorbed through the intestinal lining. The absorption of amino acids and monosaccharides uses a similar mechanism - co-transport. The absorption of lipids takes place in a different way.
