Biology revision

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Eyepiece Lense
Magnifies the image
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Course Focus
For rough focusing
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Fine Focus
For precise focusing
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Nosepiece
Rotates to move the lens into position
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Objective Lens
Magnifies the image
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Stage
Holds the slide which contains the object
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Clips
Holds the slide
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Condenser
Focuses light on the object
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Light
To suply light to the object
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Magnification
Image cell length
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Cell Wall
Gives strenght and support to the cell
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Cytoplasm
Where chemical reactions occur
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Ribosome
Site of protein synthesis
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Mitochondria
Site of respiratiomn
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Nucleus
Control centre of the cell
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Vacuole
Where cell sdap is stored
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Cell Membrane
It controls the movement of substances in and out of a cell
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Nerve cell: Adaptation
Long axon to Transmit messages across the body
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Sperm cell; Adaptation
Flagellum to swim around and fertilise the egg
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Root hair cell
Long extension increase surface area for absorbing water
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Tracheal cell
Has cilia to move particles out of lungs
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Red blood cell
To carry oxygen around the body
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Pholem
Long tubes to transport sugars
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Xylem
Dead tubes, waterproof to transport water and minerals.
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How are cells made?
Mitosis
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Cell cycle: prophase
The chromosomes star to become visible and nuclear evolope dissapears
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Cell cycle: metaphase
Chromosomes arrange themseleves at the centre of the cell and spindle fibres star to form
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Cell cycle: anaphase
The chromotids move to opposite poles and are pulled by the spindle fibres
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Cell cycle: telophase
Chromatids reach poles are noiw chromosomes again, they are no longer visible, the nuclear envolope refroms, spindle fibres disintergrate.
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Mitosis definition
Is a nuclear division, which results in cell division and production of 2 genetically identical daughter cells. the chromosomes number emains the same.
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Other cards in this set

Card 2

Front

Course Focus

Back

For rough focusing

Card 3

Front

Fine Focus

Back

Preview of the front of card 3

Card 4

Front

Nosepiece

Back

Preview of the front of card 4

Card 5

Front

Objective Lens

Back

Preview of the front of card 5
View more cards

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