Passive Transport
The movement of water across a membrane.
What is osmosis?
A solution which causes cells to decrease in volume and mass due to solute concentration.
What is a hypertonic solution?
What are transmembrane proteins?
The process of transporting large substances into the cell using a vesicle that requires energy.
What is endocytosis?
Particles tend to move in this direction, which is known as diffusion.
What is down the concentration gradient?
The term used to describe the ability of some particles to pass through the membrane while preventing the passage of other particles.
What is semi-permeable?
A solution which causes cells not to have any significant change in volume and mass due to solute concentration.
What is an isotonic solution?
Transport proteins that allow charged or polar substances to move across the cell membrane down their concentration gradient through hollow pores.
What are channel proteins?
What is up (against) the concentration gradient?
The state with which there is no concentration gradient.
What is equilibrium?
The movement of small, uncharged substances across the cell membrane down their concentration gradient.
What is simple diffusion?
A cell with a 5% solute concentration is placed within this certain type of solution which has a 4% solute concentration
What is a hypotonic solution?
Transport proteins that change shape once the substance binds to the protein, some of which require energy while others do not.
What are carrier proteins?
The process of transporting large substances out of the cell using a vesicle that requires energy.
What is exocytosis?
When there is a difference in particle concentration across an area.
What is a concentration gradient?
The movement of charged or polar substances across the cell membrane down their concentration gradient with the help of proteins.
What is facilitated diffusion?
A cell with a 45% solute concentration is placed within this certain type of solution which has a 55% water concentration
What is an isotonic solution?
Transport proteins that allow ions to move across cell membrane without requiring energy but are sometimes found in a closed configuration that does not allow ions to pass through.
What is a gated ion channel?
The organic compound needed for active transport to occur.
What is ATP?