Cell Transport Flashcards
Type of Cell Transport
• No energy required
• Molecules move from high to low concentration
Passive Transport
Type of Cell Transport
• Requires Energy
• Molecules move from low to high concentration
Active Transport
A passive process no energy used to make molecules move
• moves DOWN the concentration gradient
Diffusion
Passive process that doesn’t require energy
• uses transport protein to move from high to low concentration
Facilitated Diffusion
Major Type of Membrane Proteins
• Bind to a specific diffusing particle and deliver it to other side of membrane (carriers or transporters)
Carrier Proteins
Major Type of Membrane Proteins
• Allow passive diffusion of specific particles of appropriate size thru them
• Uniport, Symport, and Antiport
Channel Proteins
Carrier proteins used in active transport are called
•highly specific and sensitive to inhibitors that react with protein side chains
Pumps
Diffusion of water across a membrane
Osmosis
High water concentration
Low solute concentration
Low water concentration
High solute concentration
Water from the surrounding solution moves in or out of a plant cell based on osmotic concentration of the solution
•hypotonic •isotonic •hypertonic
Plasmolysis
Cells in Solution
• A solution whose solute concentration is the same as the solute concentration inside the cell
Isotonic
Cells in Solution
• Solute concentration is lower than the solute concentration inside the cell
Hypotonic
Cells in Solution
• Solute concentration is higher than the solute concentration inside the cell
Hypertonic
Cell creates a vesicle to enclose something for moving it outside the cell
Exocytosis
