Betekenis diffusiemembraan
Passief transport kan door diffusie en osmose. Diffusie is het fenomeen dat stoffen zich verplaatsen van een plek met een hoge concentratie naar een plek met een lage concentratie, langs een concentratiegradiënt. Om een cel te laten leven, moet er communicatie (= transport) zijn tussen de extracellulaire vloeistof (= interstitiële vloeistof) en de intracellulaire vloeistof (= het cytoplasma). 
- Betekenis diffusiemembraan Glucose (C 6 H 12 O 6) en aminozuren houden niet van een vetlaag zoals een zijn er voor het transport van glucose ook speciale poorten in het celmembraan. Dit transport gaan van een hoge naar een lage concentratie en kost de cel geen energie en is daarom een vorm van passief transport.
Diffusion membrane definition
Diffusion happens slowly and only across the small surface of interaction between the two fluids. Diffusion is an important part of many biological and chemical processes. In biological systems, diffusion occurs at every moment, across membranes in every cell as well as through the body. Diffusion is the movement of molecules from higher to lower concentration. In osmosis, only the solvent (water) is free to move across a semipermeable membrane from higher to lower concentration. (images: JrPol, Llywelyn) Osmosis and diffusion are two important types of mass transport.- Diffusion membrane definition This membrane diffusion is important for a variety of functions, some of which include regulating the fluidity of the membrane, the uptake of metabolites into the cell from the outside, and the removal of waste products from the inside of the cell.
Gas exchange membrane explanation
Gas exchange occurs at two sites in the body: in the lungs, where oxygen is picked up and carbon dioxide is released at the respiratory membrane, and at the tissues, where oxygen is released and carbon dioxide is picked up. Gas exchange is the biological process through which gases are transferred across cell membranes to either enter or leave the blood. Gas exchange takes place continuously between the blood and cells throughout the body, and also between the blood and the air inside the lungs.- Gas exchange membrane explanation Gas exchange is the physical process by which gases move passively by diffusion across a surface. For example, this surface might be the air/water interface of a water body, the surface of a gas bubble in a liquid, a gas-permeable membrane, or a biological membrane that forms the boundary between an organism and its extracellular environment.
Alveoli structure
Alveoli are the smallest structures in the respiratory system. They are arranged in clusters throughout the lungs at the ends of the passageways that bring air into the lungs (respiratory tree). The walls of the alveoli are very thin, which makes it easier for oxygen and CO 2 to pass between the alveoli and very small blood vessels (capillaries). Structure of Alveoli Alveoli are microscopic, balloon-like structures that are specialized for gas exchange in the lungs. Each alveolus has a hollow, sac-like shape surrounded by a dense capillary network. The walls of the alveoli are extremely thin, allowing for efficient diffusion of gases.- Alveoli structure Learn about the alveoli, the small balloon-like sacs that make up the respiratory zone of the lungs. Find out how they are structured, how they function in gas exchange, and what conditions can affect them.