Movement Of Substances Flashcards
Definition of diffusion
Net movement of substances from a region of higher concentration to a region of lower concentration down a concentration gradient.
Definition of osmosis
Net movement of water molecules from higher water potential to lower water potential down the water potential gradient and through a partially permeable membrane
What changes will happen to as plant cell as it gains water molecules and vice versa?
Plant cell+H2O—> turgid
Plant cell-H2O—-> plasmolysed
What changes will happen to an animal cell as it gains water molecules and vice versa?
Animal cell+H2O—-> burst
Animal cell-H2O—->crenated
What affects the rate of movement?
Surface area to volume ratio
What is the definition of active transport?
Net movement of substances from a region of lower concentration to a region of higher concentration with the use of energy against a concentration gradient.
