Flashcards in Chapter 5 - Cells in their environment Deck (10)
What is a selectively permeable membrane?
A membrane that only allows certain substances pass through it.
What is the concentration gradient?
A difference in concentration of a substance between two areas.
What is osmosis?
The diffusion of water across a selectively permeable membrane from an area of higher water concentration (or low solute concentration) to an area of lower water concentration (or high solute concentration), osmosis MUST occur through a selectively permeable membrane.
What is turgor pressure?
The outward pressure that is exerted on a plant cell wall by the cell contents, when water is taken in by osmosis.
What is endocytosis?
The process by which a cell moves large amounts of material, or non-dissolved particles, into it's cytoplasm from the outside environment.
What is phagocytosis
A type of endocytosis in which a cell uses pseudopods to move non-dissolved particles into it's cytoplasm from the outside environment.
What is exocytosis?
The process by which large amounts of material, or large non-dissolved particles, are moved from a cell's cytoplasm to the outside environment.
What is a permeable membrane?
A membrane that lets things pass through it.
What is a non-permeable membrane?
A membrane that lets nothing pass through it.