Osmosis Flashcards
What is osmosis?
The diffusion of water molecules from an area of high water concentration to a area of low water concentration through a semi permeable membrane
What is a semi/selectively permeable membrane?
A cell membrane that lets some molecules through but not others
What do the pores in the membrane do?
Allow small water molecules to pass through
On each side of the membrane, the concentration is…
Equal
The same number of water molecules move in ____ directions
Both
What is visking tube very similar to?
The cell membrane
What does the visking tubing have that makes it similar to a selectively/semi permeable membrane?
Tiny holes (pores), which allow small molecules through but stop molecules that are too large to fit through them
The concentration of the water outside the visking tubing is _______ than the concentration inside
Higher
Where does water move in to the visking tubing?
Through the pores using osmosis
What happens to the pressure inside the visking tubing during osmosis?
It increases and causes the solution to move up the capillary tube
What happens when osmosis occurs in an animal cell with a dilute solution? (High concentration of water)
Water moves in to the cell through the selectively permeable membrane
The cell swells and may BURST because there is no cell wall
What happens when osmosis occurs in an animal cell with a concentrated solution? (Low concentration of water)
Water moves out of the cell through the selectively permeable cell membrane
The cell SHRIVELS
What happens when osmosis occurs in a plant cell with a dilute solution? (high concentration of water)
Water moves in to the cell through the selectively permeable cell membrane
The cell becomes TURGID (the cell wall prevents it from bursting)
What happens when osmosis occurs in a plant cell with a concentrated solution? (Low concentration of water)
Water moves out of the cell through the selectively permeable membrane
The cell become FLACCID (It doesn’t shrivel because of the cell wall)
