B3.1.1 -Dissolved substances

HideShow resource information
  • Created by: Emily_O
  • Created on: 10-11-13 14:39
What is osmosis?
The diffusion of water from a dilute (e.g. less sugar more water) to a more concentrated (e.g. more sugar less water) solution through a partially permeable membrane that allows the passage of water molecules
1 of 8
What causes osmosis?
Differences in the concentration of the solutions in and outside of the cell cause water to move in or out
2 of 8
How can osmosis cause problems in animal cells if the solution outside the cell is more dilute than the cell contents?
Water will move into the cells by osmosis, causing it to swell and possibly burst
3 of 8
How can osmosis cause problems in animal cells if the solution outside the cell is more concentrated than the cell contents?
Water will move out of the cell by osmosis and it will shrivel up and can no longer survive
4 of 8
How do plants rely on osmosis to support their stems and leaves?
Water moves into the plant by osmosis which causes the vacuole to swell and press the cytoplasm against the plant cell walls causing pressure to build up, making it hard and rigid
5 of 8
Do plants need the fluid surrounding the cells to always have a higher or lower concentration of water than the cytoplasm of the cells?
Higher
6 of 8
What does active transport allow cells to do?
Move substances from an area of low concentration to an area of high concentration (against the concentration gradient)
7 of 8
Where does the energy needed for active transport come from?
Cellular respiration
8 of 8

Other cards in this set

Card 2

Front

What causes osmosis?

Back

Differences in the concentration of the solutions in and outside of the cell cause water to move in or out

Card 3

Front

How can osmosis cause problems in animal cells if the solution outside the cell is more dilute than the cell contents?

Back

Preview of the front of card 3

Card 4

Front

How can osmosis cause problems in animal cells if the solution outside the cell is more concentrated than the cell contents?

Back

Preview of the front of card 4

Card 5

Front

How do plants rely on osmosis to support their stems and leaves?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Exchange of materials resources »