Active and Passive Transport This is what we

Passive Transport üDoes not require energy üIncludes diffusion and osmosis üMoves from a high

Diffusion Molecules move from high concentration to lower concentration

Osmosis The diffusion of water across a semi permeable membrane (such as a cell

Osmosis The water will move from a higher concentration of water to a lower

Osmosis The flow of water will change depending on the solution (isotonic, hypertonic, hypotonic)

Osmosis An isotonic solution is a solution where the concentration of solutes (dissolved substances)

Isotonic Solution Water flows into and out of the cell at equal rates. Arrows

Osmosis In a hypertonic solution, there is a higher concentration of water inside of

Hypertonic Solution The water flows out of the cell, to where there is less

Osmosis In a hypotonic solution, there is a lower concentration of water inside of

Hypotonic Solution The water flows into the cell. Eventually it may rupture. Arrows show

Active Transport üRequires energy üIs the movement of molecules across a membrane üUsually moves

Active Transport Examples: ØPlants use active transport to remove nutrients from the soil ØAnimals

Active Transport • Some things are too big to pass through the cell membrane

Review- what solutions are these cells in?

Slides: 29

Download presentation

Active and Passive Transport

This is what we will study today:

Passive Transport üDoes not require energy üIncludes diffusion and osmosis üMoves from a high concentration to a low concentration

Diffusion Molecules move from high concentration to lower concentration

Osmosis The diffusion of water across a semi permeable membrane (such as a cell membrane)

Osmosis The water will move from a higher concentration of water to a lower concentration of water

Osmosis The flow of water will change depending on the solution (isotonic, hypertonic, hypotonic)

Osmosis An isotonic solution is a solution where the concentration of solutes (dissolved substances) is the same inside and outside the cell.

Isotonic Solution Water flows into and out of the cell at equal rates. Arrows show flow of water

These are cells in isotonic solution

Osmosis In a hypertonic solution, there is a higher concentration of water inside of the cell than outside of the cell. Arrows show flow of water

Hypertonic Solution The water flows out of the cell, to where there is less water. Arrows show flow of water

These are cells in hypertonic solution

Osmosis In a hypotonic solution, there is a lower concentration of water inside of the cell than outside of the cell. Arrows show flow of water

Hypotonic Solution The water flows into the cell. Eventually it may rupture. Arrows show flow of water

These are cells in hypotonic solution

Active Transport üRequires energy üIs the movement of molecules across a membrane üUsually moves from a low concentration to a high concentration

Active Transport Examples: ØPlants use active transport to remove nutrients from the soil ØAnimals use active transport to pump sodium out of cells, and potassium into cells.

Active Transport • Some things are too big to pass through the cell membrane by diffusion (passive transport). • These things need energy (active transport) to get through the cell membrane because they are too big. • Examples: glucose (sugar) and proteins.

Review- what solutions are these cells in?

Review