BIOB34H3 Chapter Notes - Chapter 5: Lipid Bilayer, Mass Flow, Passive Transport
Document Summary
Body is an open system that exchanges heat and materials with the outside environmetnt. Excretion the elimination of material from the body, and it usually takes place through the urine, feces, lungs, or skin. Xenobiotic any foreign substance in the body. Clearance the rate at which a molecule disappears from the body by excretion, metabolism, or both. Mass flow used to determine the rate of intake, output, or production of a substance: mass flow (x/min) = concentration (x/vol) x volume flow (vol/min) Homeostasis stability of the extracellular fluid compartment. Osmotic equilibrium the total amount of solute per volume of fluid is equal on the two sides of the cell membrane. Chemical equilibrium certain solutes are more concentrated in one of the two body compartments than in the other. Proteins and other large anions are concentrated in the plasma but almost absent from the interstitial fluid because they are unable to cross the endothelium.
