Biology - Chp 3 - Cell Processes Review - PowerPoint
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Transcript of Biology - Chp 3 - Cell Processes Review - PowerPoint
![Page 1: Biology - Chp 3 - Cell Processes Review - PowerPoint](https://reader036.fdocuments.us/reader036/viewer/2022062419/55847e63d8b42aa4028b46d2/html5/thumbnails/1.jpg)
Cell Processes Review
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Diffusion
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Diffusion
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Diffusion• How does the solute move?
• High to low or low to high
• Needs energy? or no energy
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Equilibrium• When concentration is the same
on either side of membrane
• No net movement of solutes
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Osmosis• Diffusion of water
• High concentration to low
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Osmosis
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Normal RBC
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What happens to RBC when…
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We place them in salt water
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We place them in distilled water
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Facilitated Diffusion• Movement of specific molecules across
cell membranes through protein channels
HighConcentration
LowConcentration
CellMembrane
Glucosemolecules
Proteinchannel
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Active Transport• High to low or low to high
• Needs energy? or no energy?
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Molecule tobe carried
Moleculebeing carried
Energy
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Carrier proteins• Proteins that act like pumps
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Endocytosis• The process of taking material into the cell
by means of infolding of the membrane
Food particle engulfing Forms a vacuole
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Phagocytosis
• Cell eating
• White blood cells do this
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Specialization
• When cells develop in different ways to perform different tasks
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Levels of Organization
Cells Tissues Organs Organ Systems
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Biological organization