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Cell Boundaries Chapter 7-3
Cell Membrane Regulates what enters and leaves the cell
Diffusion Movement of molecules from high to low concentrations
Osmosis Movement of H 2 O from area of HIGH concentration to LOW across a selectively permeable membrane
Hypotonic (“below strength”) Water will move INTO the cell causing it to swell Cells could rupture if cell takes too much water in Increases turgor pressure “Hypo Hippo”
Hypertonic Solution “above strength” Dissolved substances are HIGHER OUTSIDE & LOWER INSIDE the cell H 2 O rushes out of the cell causing it to shrivel
Isotonic Solution “same strength” Dissolved substances are the SAME OUTSIDE and are the SAME INSIDE Movement inside the cell = movement outside
Facilitated Diffusion Molecules like glucose can’t just “diffuse”, they need help by a protein channel. DOES NOT REQUIRE ENERGY HIGH to LOW
Facilitated Diffusion High to Low
Active Transport Requires ENERGY!!! (ATP) adenosine tri- phosphate and protein pumps Low concentration to High concentration
“Going Against the Gradient”
Phagocytosis “Cell Eating”
Pinocytosis “cell drinking”
Chapter 8 – Cellular Transport
Cells and Their Environment
Chapter 6.3: Membranes regulate the traffic of molecules
Chap. 5: Homeostasis and the Cell Membrane --- Homeostasis – steady state of balance between a cell and its environment.
Movement of particles across the cell membrane without using energy
The Cell Theory and Membrane Transport Cells #1 IN 43.
NOTES CHAPTER 5 CELL TRANSPORT PASSIVE TRANSPORT Movement of a substance through a cell’s membrane without use of cell energy (ATP)
Cell Transport Osmosis and Diffusion. Particles in constant motion Run into each other and randomly spread out Particles move from an area of high.
Facilitated Diffusion Active Transport
Cellular Transport and the Cell Cycle. Types of Transport Passive Transport-requires no energy for something to move with a concentration gradient (from.
Chapter 3. Passive Transport Diffusion – molecules move spontaneously (no energy used) from an area of high concentration to an area of low concentration.
Diffusion The movement of molecules from an area of high concentration to an area of low. concentration.
Objectives 7.3 Cell Transport -Describe passive transport. -Describe active transport.
Types of Transport Review. The movement of particles against the direction of diffusion requiring cell energy. ACTIVE TRANSPORT.
Mr. Chapman Biology Main Types of Transport There are 2 main types of transport when it comes to molecules moving across the cell membrane.
Getting In & Out of a Cell Osmosis & Diffusion Getting In & Out of a Cell Osmosis & Diffusion.
Cellular Transport. Functions of the cell membrane. 1. Provides boundary for cell 2. Selectively permeable- only allows certain things to pass through-
Cell Membrane Notes. Make up of the Cell Membrane Phospholipid bilayer - Two layers of charged lipids face each other, Only small particles with no charge.
Osmosis, Diffusion, Active Transport
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