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How are Plant Cells and Animal Cells Different?
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How is Mitosis Different in Plant Cells?
Plant cells do not have centrioles. Plant cells do Not do Cytokinesis. Instead they form a cell plate.
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Centrioles Animal cells contain Centrioles but plant cells do not.
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Cell Walls Plant cells have cell walls and animal cells do not.
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Vacuoles Plant cells have large vacuoles.
Animal cells have small vacuoles.
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Shape Plant cells usually have a rectangular shape.
Animal cells are usually round.
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DIFFUSION & OSMOSIS ACTIVE TRANSPORT
CELL PROCESSES DIFFUSION & OSMOSIS ACTIVE TRANSPORT
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What is DIFFUSION? Diffusion is the process of molecules moving from an area of high concentration (DENSE) to an area of low concentration (LESS DENSE).
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Does it end? Diffusion ends when molecules are evenly distributed on both sides of the cell membrane.
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How does diffusion help a cell?
Cells can get important substances. (oxygen,H2O, nutrients) Cells can get rid of wastes. (CO2, H2O, nitrogen)
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How does diffusion occur in a cell?
In living cells materials pass through small holes called PORES in the cell membrane
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HIGH LOW MOLECULES MOVE OUT OF THE CELL! HIGH TO LOW CELL MEMBRANE
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LOW HIGH MOLECULES MOVE INTO THE CELL! HIGH TO LOW CELL MEMBRANE
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Does diffusion use energy?
NO! The cell does not use energy during diffusion. Diffusion is also known as PASSIVE TRANSPORT.
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Passive transport video – 4 minutes – click once to start
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What is OSMOSIS? OSMOSIS is a special name for the diffusion of WATER across a cell membrane.
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Why is water important? Water is needed for dissolving and carrying materials, giving support to plant cells and making up 75% of your body!
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PLANT CELL WITH WATER WATER PUSHES ON CELL WALL MAKING IT RIGID
WATER VACUOLE
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PLANT CELL WITHOUT WATER
CELL WALL CAVES IN WITHOUT WATER PRESSURE CELL WALL WATER VACUOLE
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What is ACTIVE TRANSPORT?
Active Transport is the process of molecules moving from an area of low concentration (LESS DENSE) to an area of high concentration (MORE DENSE).
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Does active transport use energy?
YES! The cell uses energy during active transport.
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Why do cells use active transport?
Cells can store nutrients in high #s. (H2O, glucose, oxygen) Cells can keep wastes out. Cells get large molecules in/out
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HIGH LOW MOLECULES MOVE INTO THE CELL! LOW TO HIGH CELL MEMBRANE
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LOW HIGH MOLECULES MOVE OUT OF THE CELL! LOW TO HIGH CELL MEMBRANE
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What does SELECTIVELY PERMEABLE mean?
Selectively permeable means that the cell can control what goes in or out of the cell membrane. Also called a SEMIPERMEABLE Membrane
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Active transport video – 5 minutes – click once to start
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