7-3 Cell Boundaries Flashcards
Cell wall
A strong supporting layer around the membrane that most cells produce.
Cell membrane
A thin flexible barrier that surrounds all cells.
The composition of a cell membrane is a double layer sheet known as a?
Lipid bilayer
Concentration
Mass of solute in a give volume of solution.
Diffusion
The process in which particles make a more concentrated area and a less concentrated area.
Equilibrium
When the concentration of a solute is the same throughout the system.
Osmosis
The diffusion of water through a selectively permeable membrane.
Isotonic
When two sides of the membrane are at the same strength.
Hypertonic
A more concentrated sugar solution.
Hypotonic
A dilute sugar solution.
Facilitated diffusion
The diffusion of glucose across the membrane.
Active transport
The process by which a material may be moved the opposite direction.
Endocytosis
Process of taking material into the cell by means of infolding.
Phagocytosis
Extensions of cytoplasm surround a particle and package it within a food vacuole.
Pinocytosis
Tiny pockets form along the cell,fill with liquid, and pinch off to form vacuoles within the cell.
Exocytosis
The membrane of the vacuoles surrounding the material fuses with the cell membrane.
