specialised cells
- Created by: akt31
- Created on: 04-05-17 22:25
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- SPECIALISED CELLS(cells that have a specific job/function)
- ROOT HAIR CELLS
- helps plants take up water and mineral ions more effieciently
- increases the surface area for water to move into the cell
- have a large, permanent vacuole which speed up the movement of water into the cell by osmosis from the soil across the cell
- found near the tips of growing roots
- CONE CELLS
- help you see in colour
- outer segment
- contains a visual pigment that changes chemically in coloured light
- needs energy to change back to its original form
- mitochondria release the energy needed to reform the pigment
- lets you see continually in colour
- mitochondria release the energy needed to reform the pigment
- needs energy to change back to its original form
- contains a visual pigment that changes chemically in coloured light
- middle segment
- packed full of mitochondria
- mitochondria release the energy needed to reform the pigment
- lets you see continually in colour
- mitochondria release the energy needed to reform the pigment
- packed full of mitochondria
- final segment
- specialised synapse that connects to the optic nerve
- when coloured light makes your visual pigment change, a nerve impulse is triggered
- this makes its way along this optic nerve to the brain
- when coloured light makes your visual pigment change, a nerve impulse is triggered
- specialised synapse that connects to the optic nerve
- SPERM CELLS
- contain genetic information from the male parent
- have a long tail that whips from side to side that helps them swim through water to reach the egg
- middle section is full of mitochondria- provides energy for tail to work
- acrosome stores digestive enzymes for breaking down the outer layers of the egg
- nucleus contains the genetic information to be passed on
- FAT CELLS
- if you eat more food than you need, you body stores it in fat cells
- they help animals, including humans, to survive when food is in short supply
- they have a small amount of cytoplasm and large amounts of fats
- they have few mitochondria as the cell needs very little energy
- they can expand- a fat cell can expand up to 1000 times its original size as it fills up with fat
- ROOT HAIR CELLS
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