30287002
Descrição
Mapa Mental por Flo Sumpter, atualizado more than 1 year ago
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Criado por Flo Sumpter
mais de 3 anos atrás
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B1- cells differentiation and
specialisation
- cells differentiate to become specialised
- differentiation is the process by
which a cell changes to become
specialised for its job
- as cells change, they develop different subcellular structures and
turn into different types of cells. This allows them to carry out
specific functions.
- most differentiation occurs as an organism develops. in
most animal cells, the ability to differentiate is then lost at
an early stage, after they become specialised.
- however, losts of plant cells don't ever lose this
ability.
- however, losts of plant cells don't ever lose this
ability.
- the cells that differntiate in mature animals are
mainly used for repairing and replacing cells, such
as skin or blood cells.
- some cells are undifferentiated cells - they're called
stme cells
- differentiation is the process by
which a cell changes to become
specialised for its job
- sperm cells are specialised for reproduction
- The function of sperm is to get the male DNA to the female
DNA
- It has a long tail and a streamlined head to help
it swim to the egg
- There are a lot of mitochondria in the cell to
provide the energy needed
- it also carries enzymes in its head to digest through the egg
membrane
- The function of sperm is to get the male DNA to the female
DNA
- Nerve cells are specialised for rapid signalling
- the function of nerve cells is to carry electrical signals from one part of
the body to another
- These are long and have branched connections at their ends to connect
to other nerve cells and form a network throught the body
- the function of nerve cells is to carry electrical signals from one part of
the body to another
- muscle cells are specialised for contraction
- the function of muscle cells is to contract quickly
- these cells are long and contain lots of
mitochondria to generate the energy needed
for contraction.
- the function of muscle cells is to contract quickly
- root hair cells are specialised for absorbing water and minerals
- root hair cells are cells on the surface
of plant roots, which grow into long
'hairs' that stick out into the soil
- this gives the plant a big surface area for absorbing
water and mineral ions from the soil
- root hair cells are cells on the surface
of plant roots, which grow into long
'hairs' that stick out into the soil
- phloem and xylem cells are specialised for
transporting substances
- phloem and xylem cells form phloem
and xylem tubes, which transport
substances such as food and water
around plants.
- to form the tubes, the cells are long and
joined end to end
- xylem cells are hollow in the centre
- phloem cells have very few subcellular structures,
so that stuff can flow through them.
- phloem and xylem cells form phloem
and xylem tubes, which transport
substances such as food and water
around plants.
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