Specialised Cells
1. Palisade Cells
* packed with chloroplasts for photosynthesis
* a hatful of surface area for absorbing CO2
* they are grouped in concert to give the palisade layer
2. Guard Cells
* open and c retrogresss the stomata (pores)
* when the plant has a lot of H2O, the guard cells fill with it, turns turgid
* when the plant has short of H2O, the guard cells lose H2O, turns flaccid
3. Red Blood Cells
* concave shape, giving it a gravid surface area for absorbing oxygen
* packed with haemoglobin
* no nucleus, for to a greater extent room for haemoglobin
4. sperm and Eggs
Egg Cell to carry womanish DNA and to nourish the developing embryo in the earliest stages, when a sperm fertilises with an egg, the eggs membrane changes
Sperm Cell to carry the male DNA to the female DNA. Has a long tail and a streamlined head to service of process it swim to the egg. It has a lot of mitochondria to provide it energy
Diffusion
is the movement of particles from a High ducking to a Low Concentration.
- diffusion happens in both liquid and gases because they are free to move
- the bigger the discrepancy in concentration, the faster the diffusion rate
The Rate of Diffusion
a) Distance substances pervade more quickly
b) Concentration Difference (Gradient) substances diffuse faster if on that points a big difference in concentration
c) pick out along Area the more surface are, the faster they can get from one side to another
Osmosis
is the movement of water molecules from an High Concentration to Low Concentration across a partially leaky membrane
1) A Partially Permeable membrane is one with very small holes, only tiny molecules can pass through with(predicate) them
2) Water molecules pass both ways through the membrane during osmosis. This happens because water molecules move randomly
3) Because there is more water, theres a steady net flow of water
4) This agent strong sugar solution gets more...If you want to get a full essay, order it on our website: Ordercustompaper.com
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