Biology- cell activty

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Organelles in an animal cell
Mitochondria, nucleus, cytoplasm, cell membrane, ribosomes.
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Organelles in a plant cell
Mitochondria, nucleus, cytoplasm, cell membrane, cell wall, ribosomes, chloroplasts, permanent vacuole.
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Function of membrane
Allows oxygen, carbon dioxide, water, glucose to exit/ enter cell; a barrier between cell and surroundings.
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Function of cell wall
Stops cells bursting, gives cells their shape.
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Function of chloroplasts
Photosynthesis, contains chlorophyll, stores starch.
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Function of cytoplasm
Respiration, making proteins.
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Function of permanent vacuole
Full of water to maintain shape and firmness, stores salt and sugars.
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Function of nucelus
Controls all cell activities, contains DNA.
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Function of mitochondria
Where energy is released during respiration.
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Function of ribosomes
Where proteins are made.
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Magnification=
image size/ actual size
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Organelles in a bacteria cell
Slime capsule, cell wall, cell membrane,flagella, plasmids, cytoplasm, genetic material
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Organelles in a yeast cell
Vacuole, food storage granule, cytoplasm, cell wall, cell membrane, nucleus.
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Specialised cell is...
a cell adapted to do a specific function.
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Adaptions of a fat cell
Small amount of cytoplasm, large amount of fat, few mitochondria, can expand up to 1000x its original size.
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Adaptions of a human cone cell
Visual pigment, lots of mitochondria, synapses.
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Adaptions of root hair cell
Root hair to increase surface area, large permanent vacuole to speed osmosis.
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Adaptions of sperm cell
Tail to move, full of mitochondria, acrosome, large nucleus.
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Diffusion
The net movement of particles from an area of high to low concentration.
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Osmosis
The diffusion of water from a dilute to more concentrated solution through a partially permeable membrane.
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Hypertonic
Has a higher concentration of solutes outside than in (shrivels up)
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Isotonic
Same concentration of solutes outside and in. (just right for animal cells)
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Hypotonic
Has a higher concentration inside the cell than out (good for plant cells, animal cells burst)
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Active transport
The movement of substances against a concentration gradient and/or across a cell membrane, USING ENERGY.
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Adaptions for exchanging materials
Large surface area (villi in the small intestine, root hair), thin short diffusion path, large blood supply, ventilated (alveoli)
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How do food molecuels reach cells from the small intestine?
Active transport and diffusion
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Other cards in this set

Card 2

Front

Organelles in a plant cell

Back

Mitochondria, nucleus, cytoplasm, cell membrane, cell wall, ribosomes, chloroplasts, permanent vacuole.

Card 3

Front

Function of membrane

Back

Preview of the front of card 3

Card 4

Front

Function of cell wall

Back

Preview of the front of card 4

Card 5

Front

Function of chloroplasts

Back

Preview of the front of card 5
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