Terms in this set (17)
Energy-requiring movement of molecules across a membrane from a region of lower concentration to a region of higher concentration.
Forms a boundary between a cell and the surrounding environment and controls the passage of materials into and out of the cell.
Difference in the concentration of a substance from one location to another.
Movement of dissolved molecules in a fluid or gas from a region of higher concentration to a region of lower concentration.
Uptake of liquids or large molecules into a cell by inward folding of the cell membrane.
Release of substances out of a cell by the fusion of a vesicle with the membrane.
Diffusion of molecules assisted by protein channels that pierce a cell membrane.
Fluid mosaic model
Model that describes the arrangement and movement of the molecules that make up a cell membrane
Solution that has a higher concentration of dissolved particles (solutes) compared with another solution.
Solution that has lower concentration of dissolved particles (solutes) compared with another solution.
Solution that has an equal concentration of dissolved particles compared with another solution.
Diffusion of water molecules across a semipermeable membrane from an area of higher water concentration to an area of lower water concentration.
Movement of molecules across the cell membrane without energy input from the cell.
Uptake of a solid particle into a cell by engulfing the particle.
Molecule that forms a double-layered cell membrane consisting of a phosphate group, glycerol, and two fatty acids
Protein that detects a signal molecule and performs an action in response
Condition allowing some but not all materials to cross a barrier or membrane.