Osmosis and Diffusion

1
Osmosis and Diffusion

• Aim To be able to explain what osmosis and
  diffusion are.

2
Which structure controls movement in and out of a
cell?

• Cell Wall
• Cell Membrane
• Cytoplasm
• Aerobic

3
Where do most chemical reactions take place in
the cell?

• Nucleus
• Cell Membrane
• Cytoplasm
• Vacuole

4
What is the function of the ribosomes?

• Release energy
• Control the cells activities
• Synthesis of carbohydrates
• Synthesis of proteins

5
Organelles found in plant cells and not animal
cells are

• Vacuole, cell wall, chloroplasts
• Chloroplasts, cell membrane, vacuole
• Chloroplasts, mitochondria, vacuole
• Cell membrane, ribosomes, chloroplasts

6
Which specialised cells are adapted by being able
to squash?

• Sperm cell
• Red Blood cell
• Epithelial cell
• Egg cell

7
Which cell is adapted by having lots of
chloroplasts to absorb sunlight?

• Root Hair cell
• Epithelial cell
• Guard cell
• Palisade cell

8
Movement in and out of cells?

• What controls movement in and out of cells?
• What might move in and out of cells?
• How to particles move in and out of cells?

9
Diffusion

• What is it?
• Where might it occur?

10
Diffusion

• The passive movement of particles from an area of
  high concentration to an area of low
  concentration.

11
AIR
SMELL DIFFUSED IN THE AIR
A SMELL
12
CELL MEMBRANE
AMINO ACID
GLUCOSE
PROTEIN
STARCH
13
OSMOSIS

• Movement of water molecules across a partially
  permeable membrane from a region of high water
  concentration to a region of low water
  concentration.

14
Osmosis in potato tubers

• Which chip do you think will get longer? Why?
• Which chip do you think will get shorter? Why?
• Molecules move from a .. Concentration to a .
  Concentration. Osmosis is the movement of .
  Molecules from a .. solution into a . Solution
  across a partially permeable membrane. When plant
  cells take up water by osmosis they become
  turgid. T.. Cells help support parts of a plant
  like the . If plant cells lose a lot of water
  the cell.. Peels away from the cell.. and the
  plant wilts.

15
WATER
SUGAR SOLUTION
16
Osmosis/Diffusion

• Write 2 concluding sentences incorporating the
  highlighted words.
• Diffusion, random, concentration
• Osmosis, partially permeable, solute