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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. DIFFUSION.
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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
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
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 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!