Topic 2-Cells And Control

Mitosis (I.P.M.A.T.C)
1) INTERPHASE- to prepare for cells division, each chromosome is copied. 2)PROPHASE-The nuclear membrane breaks down. 3)METAPHASE-The chromosomes line up in the centre of the cell 4)ANAPHASE- cell fibres pull the chromosmes apart.
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Mitosis (I.P.M.A.T.C) (continued)
5)TELOPHASE- the chromosomes move to different sides of the cell 6)CYTOKINESIS- the cells begin to split in two.
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Stem Cells
Cells differentiate to become specialised cells. Undifferentiated cells are called stem cells.Stem cells are found in early human embryos.
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Meristems
In plants the only cells which divide by mitosis are found in plant tissue called meristems. Meristem tissue is found in the areas of a plant that are growing e.g the tips of the roots and shoots. They produce unspecialised cells thats are able to di
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Stem Cells In Medicine
Scientists have extracted stem cells from early human embryo and growing them. Doctors use adult stem cells to cure some diseases.
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Sensory Neuron's
They carry signals from receptors to the spinal cord or brain.
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Motor Neuron's
They carry signals to the parts of our bodies which move.
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Relay Neuron's
They carry signals from sensory to motor neuron's
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What are synapses?
The connection between two neuron's is called a synapse. The nerve signal is transferred by chemicals called neurotransmitters, which diffuse (move) across the gap. The neurotransmitters then set off a new electrical signal in the next neuron.....
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What are synapses? (continued)
The transmission of a nerve impulse is very fast, but is slowed down a bit because the diffusion of neurotransmitters across the gap takes time.
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Card 2

Front

5)TELOPHASE- the chromosomes move to different sides of the cell 6)CYTOKINESIS- the cells begin to split in two.

Back

Mitosis (I.P.M.A.T.C) (continued)

Card 3

Front

Cells differentiate to become specialised cells. Undifferentiated cells are called stem cells.Stem cells are found in early human embryos.

Back

Preview of the back of card 3

Card 4

Front

In plants the only cells which divide by mitosis are found in plant tissue called meristems. Meristem tissue is found in the areas of a plant that are growing e.g the tips of the roots and shoots. They produce unspecialised cells thats are able to di

Back

Preview of the back of card 4

Card 5

Front

Scientists have extracted stem cells from early human embryo and growing them. Doctors use adult stem cells to cure some diseases.

Back

Preview of the back of card 5
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