Download - In and Out of Cells
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In and Out of CellsIn and Out of Cells
The cell membrane is like The cell membrane is like a plastic bag with tiny a plastic bag with tiny openings.openings.
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Materials such as water, Materials such as water, oxygen, and glucose oxygen, and glucose
(sugar), pass through the (sugar), pass through the cell membrane.cell membrane.
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One way that materials move One way that materials move through the membrane is called through the membrane is called
DIFFUSION. DIFFUSION.
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Particles move from areas of Particles move from areas of HIGH concentration to LOW HIGH concentration to LOW
concentrationconcentration
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Osmosis Osmosis (diffusion of (diffusion of waterwater))
Movement of WATER molecules Movement of WATER molecules from high concentration to low from high concentration to low concentrationconcentration
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Compare / ContrastCompare / Contrast
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Larger particles need to go Larger particles need to go through a membrane protein through a membrane protein
“doorway.”“doorway.”
Passive TransportPassive Transport (needs no (needs no
energy)energy)
Glucose molecules
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Active TransportActive Transport (needs energy)(needs energy)
Requires Requires energy energy because it because it movesmovesfrom low to from low to high high concentratioconcentration. n.
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EnEndocytosis: docytosis: Moving aMoving a large particle large particle intointo the cell the cell
Vesicle from Golgi Body
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Exocytosis Exocytosis Moving a Moving a large particle OUT of the cell large particle OUT of the cell
(EXITS)(EXITS)