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Cell Mem. Transport

Cell Membrane Transport Study Guide

TermDefinition
Cell Membrane are made up of Proteins and Lipids
All Cells have Cell Membranes
Some Cells have Cell Membranes and Cell Wall
Example of Cells that have a cell membrane and Cell wall Plants and Fungi
Cell Membrane Characteristics Thin, Flexible barrier
Cell Membrane Regulates what enters and exists the cell
Plant Cells have a Cell Wall
Cell Wall is made up of Cellulose
Bacteria and Fungi have a cell wall, but do not contain Cellulose
Cell Membrane and Cell Wall are Porous allowing carbon dioxide Oxygen and Nutrients pass through easily.
Cell Membrane separates the components of a cell from its ENVIRONMENT surrounds the cell
Gatekeeper of the cell regulates the flow of materials into and out of cell SELECTIVELY PERMEABLE
Cell Membrane Helps Cell maintain HOMEOSTASIS stable internal BALANCE.
Solute Substance that is dissolved in a solvent to make a solution
Solvent Substance in which a solute is dissolved to make a solution.
Solution Mixture of two or more substances in which the molecules of the two substances are evenly distributed.
Passive Transport A Process that does not require energy to move molecules from HIGH to LOW concentration.
Passive No energy needed
Active Energy needed
Diffusion Is the movement of SMALL particles across a SELECTIVELY PERMEABLE membrane like the cell membrane until EQUILIBRIUM is reached.
What happens to the particles during Diffusion Moved from an area of HIGH CONCENTRATION to an area of LOW CONCENTRATION
Osmosis The DIFFUSSION of WATER through a selectively permeable membrane like the cell membrane.
Water diffuses across a membrane from an area of HIGH CONCENTRATION of water to an area of LOW CONCENTRATION.
Hypertonic Solutions Contain a HIGH CONCENTRATION of solute relative to another solution.
Hypotonic Solutions Contain a LOW CONCENTRATION of solute relative to another solution.
Isotonic Solutions Contain the SAME CONCENTRATION of solute as another solution.
Facilitated Diffusion The movement of LARGER MOLECULES like glucose through the cell membrane- larger molecules must be" helped"
Proteins in the cell membrane form CHANNEL for LARGE molecules to pass through
Proteins Channel Proteins that form channels (pores).
One type of substance can pass through the Protein Channel Glucose Molecules
Active Transport is transport across the cell membrane with the use of energy.
Protein Pumps Proteins that work as pumps
Endocytosis and Exocytosis is the mechanism by which VERY LARGE MOLECULES get into and out of the cell
Food is moved into the cell by Endocytosis
Waste are moved out of the cell by Exocytosis
Two types of Endocytosis Phagocytosis and Pinocytosis
Phagocytosis Extension of the cytoplasm surround a particle and package it within the vacuole.
Pinocytosis Pockets form along the cell membrane, fill with liquid and pinch off the form vacuoles within the cell.
Types of Active Transport Endocytosis and Exocytosis
Equilibrium When the concentration of a solute is equal throughout the solution.
Once Equilibrium has been reached Particles continue to move across the membrane in both directions maintaining the equilibrium of the solution.
Concentration The Mass of a solute in a given volume of a solution: Solute (g)/Solution (mL)
The first Concentration is Twice as concentrated as the second solution
No Energy Needed Diffusion, Osmosis, Facilitated Diffusion
Energy Needed Active Transport
Created by: spotsville2