Passive Methods Of Transport Flashcards
Where do passive transport substances always move from?
From a high to low concentration.
What is diffusion?
The movement of molecules from a region of high concentration to a region of low concentration.
What does diffusion allow substances to do?
To move from one area to another and also allowing materials to enter and leave the cell.
When does diffusion stop?
It continues until the concentration of the substance is even throughout. Just because diffusion has stop doesn’t mean the molecules stop moving though.
What is osmosis?
The movement of water molecules from a region of high water concentration to a region of lower water concentration through a selectively permeable membrane.
Why is osmosis a special type of diffusion?
Because it only involves the movement of water molecules.
Why is osmosis important?
Because all cells require water to survive.
What is active transport?
The movement of molecules across a cell membrane against a concentration gradient. Unlike diffusion and osmosis molecules do not move by themselves in active transport.
What does active transport require?
It requires energy because it moving against a concentration gradient that is from low to high. The energy is provide by ATP which is produced during respiration.
