Small, non-polar molecules like oxygen, carbon dioxide, and water can passively diffuse through cell membranes and be absorbed into the blood. Lipid-soluble molecules and small uncharged molecules can also passively cross cell membranes to enter the bloodstream.
Facilitated diffusion moves molecules through cell membranes passively.
Vitamin C molecules, water molecules and glucose molecules are very easily absorbed because they don't have as many particles as starch molecules, protein molecules and fat molecules.
Molecules can enter a cell passively through processes like simple diffusion or facilitated diffusion. For this to occur, the molecule must be small, nonpolar, and/or able to pass through ion channels or carrier proteins. Additionally, there must be a concentration gradient across the cell membrane to drive the movement of molecules into the cell.
When molecules are linked in organized positions has solid results. When heat is absorbed by a solid the molecules vibrate faster and faster.
Small molecules are primarily absorbed in the gastrointestinal (GI) tract, particularly in the small intestine. The small intestine has a large surface area due to its villi and microvilli, which facilitate efficient absorption of nutrients and drugs into the bloodstream. Some small molecules can also be absorbed in the stomach and large intestine, but the small intestine is the main site for most substances.
It is where food molecules/ nutrients are absorbed into the blood.
From digestion to inter-cellular space through to blood vessels, in which the blood then brings the molecules to rest of the body
Large molecules, such as proteins and polysaccharides, cannot be absorbed directly into the blood because they are too big to pass through the walls of the intestine. Instead, they need to be broken down into smaller molecules before they can be absorbed.
A high level of salt in a cell would cause water molecules to move passively into the cell.
Water is absorbed into the blood through a process called osmosis in the small intestine. The water molecules pass through the walls of the small intestine and into the bloodstream, where they are then circulated throughout the body.
Molecules must pass through cell membranes or be absorbed by cells lining the digestive tract to enter the blood. This process can be facilitated by active transport, passive diffusion, or specific carrier proteins, depending on the molecule. Once absorbed, molecules are transported through the bloodstream to reach their target tissues.
Three main functions of the digestive system:1. Breaks down food into molecules. hi2. Molecules are absorbed into the blood and carried throughout the body.3. Wastes are eliminated from body.
Water is absorbed into the blood from the digestive tract through a process called osmosis. In the small intestine, water molecules move through the intestinal wall and into the bloodstream, where they are then circulated throughout the body.
Carbohydrates are the rapid energy foods, they are fragmented inside the intestinal lumen before they are absorbed into the blood or lymphatic system.
Cheese toast
Monosaccharides are simple sugars with three to seven carbon atoms in its carbon skeletons. They are absorbed in the blood because, most organisms use glucose (which is also referred to as blood sugar) as a source of energy. The energy in glucose, and in all molecules, is contained in the atoms and bonds of the molecule itself.
The simple sugars do but not the fats. The presence of fat in the small intestine produces hormones that stimulate the release of pancreatic lipase from the pancreas and bile from the liver which helps in the emulsification of fats for absorption as fatty acids.