Injested carbohydrates are broken down through saliva and the stomach into smaller fragments called mono saccharides, or simple sugars. These sugars are transported to the absorptive cells in the lining of the stomach, where they are in, exit, then passively diffuse into the adjoining capillaries.
Nutrients exit and waste enters red blood cells in the capillaries within tissues. These exchanges occur through the thin walls of the capillaries by diffusion.
The capillary bed in the lungs is where the oxygen and carbon dioxide are exchanged.
1. Sugar (sucrose) cannot penetrate the cells and cannot be absorbed in blood because this disaccharide molecule is too big. 2. After the degradation of the disaccharide to monosaccharides (fructose, glucose, etc.) with the help of the enzyme sucrase these monosaccharides are easily absorbed in blood. 3. The monosaccharides molecules can penetrate by diffusion.
From stage of the cell cycle do cells somtimes exit?
cell membrane
It controls the entry and exit of substances.
"The cell membrane has openings in it." (PLATO) (:
selective permeability
Selective permeable
selective permeability
Osmosis
selective permeability