EXOCYTOSIS & ENDOCYTOSIS

UNDERSTANDING LIFE SYSTEMS CELLS

3.4  explain the processes of diffusion and osmosis and their roles within a cell

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CURRICULUM

PASSIVE & ACTIVE�TRANSPORT

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PASSIVE & ACTIVE TRANSPORT

PASSIVE TRANSPORT

• requires NO energy

HIGH

CONCENTRATION

LOW

CONCENTRATION

• Diffusion
• Osmosis

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PASSIVE & ACTIVE TRANSPORT

ACTIVE TRANSPORT

• requires energy

HIGH

CONCENTRATION

LOW

CONCENTRATION

• Endocytosis
• Exocytosis
• Sodium-Potassium Pump

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ACTIVE TRANSPORT

• the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration - against the concentration gradient
• Active transport requires cellular energy to achieve this movement

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PASSIVE & ACTIVE TRANSPORT

PASSIVE TRANSPORT

• requires NO energy
• WITH concentration gradient

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ACTIVE TRANSPORT

• requires energy
• AGAINST concentration gradient

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EXOCYTOSIS & ENDOCYTOSIS

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Cells can’t get all they need through DIFFUSION and OSMOSIS

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ENDOCYTOSIS

The process by which the cell moves large amounts of material INTO it’s cytoplasm

IN

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ENDOCYTOSIS

• PHAGOCYTOSIS (“eating”) occurs when the cell brings in solid particles
• PINOCYTOSIS (“drinking”) occurs when the cell brings in liquid products

IN

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EXOCYTOSIS

The process by which the cell moves large amounts of material OUT of the cytoplasm

OUT

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STAND IN A CIRCLE

HOLDING HANDS

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ENDOCYTOSIS

the cell extends finger-like projections called pseudopods and surrounds the material being brought in

IN

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EXOCYTOSIS

the cell creates a vacuole of waste products and merges this vacuole with the cell membrane to release the contents outside the cell

OUT

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• Active Transport
• Passive Transport
• Endocytosis
• Exocytosis
• Pseudopods
• Phagocytosis
• Pinocytosis

ADD IT TO THE

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