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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.
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).
Does it end?
Diffusion ends when molecules are evenly distributed on both sides of the cell membrane.
How does diffusion help a cell?Cells can get important substances. (oxygen,H2O, nutrients)Cells can get rid of wastes.(CO2, H2O, nitrogen)
How does diffusion occur in a cell?In living cells materials pass through small holes called PORES in the cell membrane
Does diffusion use energy?
NO! The cell does not use energy during diffusion.
Diffusion is also known as PASSIVE TRANSPORT.
Why is water important?
Water is needed for dissolving and carrying materials, giving support to plant cells and making up 75% of your body!
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 (DENSE).
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
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