Movement Across A Cell Membrane

Any Difference In Plant And Animal Cells?

What is a hypotonic solution

Hypotonic solution: a solution with a lower salt concentration than in normal

cells of the body and the blood.

What is Hypertonic Solution ?

• A Hypertonic solution is a solution with a higher salt concentration than in normal cells of the body and the blood.

Movement of Water• Osmosis is when water particles move

from an area of higher concentration to an area of lower concentration through a semi permeable membrane.

How Does A Plant Cell Cope??

HYPOTONIC In a hypotonic solution the plant cells harden

due to the absorbing of water.HYPERTONIC in a hypertonic solution the plant cells cannot

absorb the salt solution and so end up floppy.

How Does An Animal Cell Cope ??

Hypotonic In a hypotonic solution an animal cell tends to

rupture due to osmotic pressure.

Hypertonic In a hypertonic solution an animal cell tends

to crenate (shrivel up due to loss of water ).

The Difference Between A Plant and An Animal cell

Why Transport In and Out Of Cells Is Important

• The cell membrane is a semi-permeable tissue which controls what goes in and out of a cell.

• Its acts as a barrier to most but not all molecules.• It allows some materials to pass through, whilst

restricting others.• It separates The inner cellular environment from

the outer cellular environment• It is important that this happens because it needs to

allow molecules that we no longer need out of the cell whilst taking in those that we do need.