BIO 189 Study Guide - Midterm Guide: Semipermeable Membrane, Facilitated Diffusion, Membrane Transport
Document Summary
Homeostasis is the maintenance of the constancy of the internal environment. It is necessary for the optimal functioning of physiological processes and requires energy- dependent steady state conditions. One of the compartments that body fluid is distributed to. Movement of particles from an area of higher concentration to an area of lower. Process of diffusion, a form of passive transport, via which molecules diffuse across membranes, with the assistance of transport proteins. The diffusion of water across a semi-permeable membrane from a less concentrated solution of solute to a more concentrated solution of solute. Passive movement through a membrane involving a specific carrier protein. Carrier protein causes channel molecule to open. Energy dependent (atp) transport of a substance across membrane against concentration: distinguish between a steady-state and equilibrium condition. Nutrients consumed by cellular activity must be replaced from the external environments. Waste products delivered to the internal environment must be dumped into the external.
