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Types of Transport Review
The movement of particles against the direction of diffusion requiring cell energy. ACTIVE TRANSPORT
True or False? During diffusion molecules tend to move down the concentration gradient. TRUE
General transport method by which most molecules move across the membrane. DIFFUSION
A difference in concentration across a cell’s membrane. CONCENTRATION GRADIENT
Endocytosis of solid substances like bacteria and food. PHAGOCYTOSIS
A liquid mixture that involves the combination of a solvent with a solute. SOLUTION
Active transport of molecules out of a cell. EXOCYTOSIS
The movement of particles from high to low concentration. DIFFUSION
An equal amount of a substance inside the cell and the environment the cell is living in. ISOTONIC
The diffusion of water across a cell membrane. OSMOSIS
Endocytosis of liquids. PINOCYTOSIS
Active transport of molecules into a cell. ENDOCYTOSIS
The substance dissolved in the liquid part of the solution. SOLUTE
The movement of a substance from high to low concentration without energy. PASSIVE TRANSPORT
Type of membrane that allows ALL substances to pass through it. PERMEABLE
The liquid into which the solute is dissolved. SOLVENT
To be in balance or in a state of equality. EQUILIBRIUM
Type of membrane that allows only SOME substances to pass through it. SEMI-PERMEABLE (selectively)
More solute, less water inside the cell than the environment the cell is living in. HYPOTONIC
A type of membrane that allows NO substances to pass through it. IMPERMEABLE
How does a water molecule enter and exit a cell? OSMOSIS
How do most sugar molecules enter and exit a cell? ACTIVE TRANSPORT
More solute, less water outside the cell than inside the cell. HYPERTONIC
Can you identify two differences between active and passive transport? TYPE OF SUBSTANCES CONCENTRATION GRADIENT ENERGY – YES or NO?
Can you identify the methods of transport that do NOT require energy by the cell? PASSIVE TRANSPORT DIFFUSION OSMOSIS
What factors can control the rate of diffusion? TYPE OF MEMBRANE CONCENTRATION GRADIENT SIZE OF SUBSTANCE TEMPERATURE ACTIVITY LEVEL
In what direction do substances naturally travel? HIGH TO LOW CONCENTRATION
What cell structure controls diffusion and osmosis? CELL MEMBRANE
Your life depends on... Active Transport!
Cells and Their Environment
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.
Ch. 5 – Homeostasis & Transport What is homeostasis? It is the biological balance of relationship between an organism’s cell and its environment. Homeostasis.
Cell Transport Biology Review ATP is the molecule used for energy made by the cell 2 1.True 2.False 10.
Movement of particles across the cell membrane without using energy
Chapter 7.3 Cell Transport
Facilitated Diffusion Active Transport
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.
PASSIVE TRANSPORT Movement of molecules across a membrane that requires no energy and always occurs down a concentration gradient Types of passive transport.
Getting In & Out of a Cell Osmosis & Diffusion Getting In & Out of a Cell Osmosis & Diffusion.
Chapter 2 Lesson 3 Moving Cellular Materials. Cell Membrane The cell membrane is selectively permeable ◦ It allows certain things into the cell while.
The Cell Environment Jennifer Naples DI Biology. Cell Membrane Works as the gatekeeper of the cell It is selectively permeable – it lets some substances.
Cell Membrane What is it? – Barrier that separates cell from external environment – Composed of two phospholipid layers Other molecules are embedded in.
Cells, Cells, Cells Active Transport and Passive Transport.
Passive vs. Active Transport. Passive Transport Does NOT require energy Moves substances from higher to lower concentration.
Passive vs Active Transport Osmosis, Diffusion, and Energy.
Do Now! Copy vocabulary words into your notebooks: cell membrane concentration diffusion osmosis equilibrium active transport passive transport.
KEY CONCEPT Materials move across membranes because of concentration differences. 3.4 Diffusion and Osmosis.
PASSIVE TRANSPORT One way cells maintain homeostasis is by controlling the movement of substances across their cell membrane. Cells want to reach “equilibrium”.
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