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Diffusion The movement of molecules from an area of high concentration to an area of low. concentration.
Diffusion causes many substances to move across cell membranes. No energy is require of the cell.
Osmosis Osmosis is the diffusion of water through a selectively permeable membrane
Hypertonic solution p. 186 - 187 contains a higher concentration of impermeable solutes outside of the cell. Water will flow out of the cell The cell will shrink
Hypotonic solution contains a lower concentration of impermeable solutes outside of the cell. Water will flow into the cell The cell will swell
Isotonic solution The concentration of impermeable solutes is the same inside and outside the cell. Water will flow in and out of the cell at an equal rate. The cell will not change size.
DIFFUSION & OSMOSIS.
* Water Concentrations * Movement of water molecules (H20) across a permeable membrane. * Molecules move from area of high concentrations to areas of.
Cell Membrane Controls what materials enter or leave the cell Also called the phospholipid bilayer Heads are hydrophilic(“water loving”) They attract.
Osmosis (diffusion of water through a selectively permeable membrane) Membrane X is permeable to water but not to protein Which side has the highest concentration.
Movement IN and OUT of Cells Substances move in and out through the cell membrane Moving from high to low concentration DOES NOT REQUIRE ENERGY by the.
OSMOSIS OSMOSIS: The diffusion of water through a selectively permeable membrane SELECTIVELY PERMEABLE: some substances pass like water and others do.
Cells and Cellular Transport
Objectives: 1) Explain how the processes of diffusion and osmosis occur and why they are important to cells. 2) Predict the effect of a hypotonic, hypertonic,
Osmosis. Energy requirements? No energy required Modes of passive transport? Diffusion through cell membrane The movement of a substance from.
Movement of particles across the cell membrane without using energy
Passive Transport Section 4.1.
Cell Membrane Transport Notes
Cell Membrane Transport: Osmosis 8.1 Section Objectives – page 195 Section Objective: Predict the effect of a hypotonic, hypertonic, or isotonic solution.
Transporting substances By Sangarun sangchachat Diffusion Diffusion is the movement of particles from an area of high concentration to an area of low.
Osmosis. 2 Diffusion of water across a membrane Diffusion of water across a membrane Moves from high water potential (low solute) to low water potential.
Facilitated Diffusion Active Transport
Chapter 4. Transport Across the Cell Membrane Substances need to move into and out of the cell in order to maintain homeostasis They can do this by.
Cellular Transportation. Diffusion TO High Concentration Low Concentration.
PASSIVE TRANSPORT Movement of molecules across a membrane that requires no energy and always occurs down a concentration gradient Types of passive transport.
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