Osmosis and Diffusion Flashcards
Diffusion
..is the movement of molecules from areas of high concentration to areas of lower concentration.
Diffusion is a ……. process
passive
Active transport
..is the movement of molecules from areas of low concentration to areas of higher concentration.
Active transport requires…
energy
Osmosis
The movement of water from an area of high water concentration to an area of lower water concentration across a semi-permeable membrane
Isotonic means…
two solutions have the same solute concentration.
If an animal cell is surrounded by an isotonic solution, water will…
…move in and out at the same rate and the cell will remain intact.
Give an example of osmoregulation in the human body.
Our kidneys makes sure the fluid in our bodies that surrounds our cell (plasm) has a stable concentration
Hypotonic
means a solution has a lower solute concentration than another solution.
Hypertonic
means a solution has a higher solute concentration than another solution
What would happen if an animal cell was surrounded by a hypotonic solution?
Water would move into the cell and may cause it to burst.
What would happen if an animal cell was surrounded by a hypertonic solution?
Water would move out of the cell and may cause it to shrivel up and die.
The cell wall is ______ permeable:
a) Semi
b) Im…
c) Fully
c) Fully
How do roots absorb water?
If a plant cell is surrounded by a less concentrated solution, then water will move into the cytoplasm and vacuole of plant cells.
Define Turgor pressure
The pressure of the cytoplasm and the vacuole pushing the membrane against the cell wall of a plant.
