Movement Through Cell Membranes

Define Diffusion

The spreading out of molecules from a region of high to low concentration

Define Osmosis

The movement of molecules through a semi-permeable membrane from a region of high to low concentration

Label This Diagram

a - diffusion

b - osmosis

Define Passive

Does not require energy

Label This Diagram

Osmosis in Cells

a - hypertonic

b - isotonic

c - hypotonic

Define Hypertonic

In Animal Cells

Water moves out the cell due to a more concentrated solution outside

What happens to Hypertonic Animal Cells

Cell shrivels and dies

Define Isotonic

In Animal Cells

Water equally moves in and out the cell due to an equally concentrated solution outside

What happens to Isotonic Animal Cells

Cell volume stays the same

Define Hypotonic

In Animal Cells

Water moves into the cell due to a less concentrated solution outside

What happens to Hypotonic Animal Cells

Cell enlarges and bursts

Define Turgor

The force of the cell contents against the cell wall

Define Isotonic

In Plant Cells

Water equally moves in and out the cell due to an equal concentrated solution outside

What happens to Isotonic Plant Cells

Cell volume stays the same

Define Hypotonic

In Plant Cells

Water moves into the cytoplasm due to a less concentrated solution outside

What happens to Hypotonic Plant Cells

Turgor Pressure

Define Hypertonic

In Plant Cells

Water moves out the cytoplasm using osmosis due to a more concentrated solution outside

What happens to Hypertonic Plant Cells

Plasmolysis

Define Plasmolysis

Loss of turgor pressure in plant cells due to loss of water

Define Permeable

Substances can pass through

Define Imperable

Substances are not allowed to pass through

Define Semi-Permeable

Some substances are allowed to pass through

Define Food Preservation

Salting food results in the water being removed from harmful micro-organisms and not spoiling the food