Other types of cell transport

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Other types of cell transport 7-3
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TRANSPORT PROTEINS

• CHANNEL PROTEINS facilitated diffusion

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REMEMBER...

• Molecules, including water move freely down
  concentration gradient by the processes of
  diffusion osmosis.

This is called Passive Transport!
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ACTIVE TRANSPORT

• Molecules move against (or up) the
  concentration gradients
• Needs energy
• Therefore

LOW
Molecules move from _________ concentrations to
_________ concentrations.
HIGH

• Active transport requires carrier proteins to
  help ions (Sodium pumps) and large particles
  (sugar) across membrane.

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WHAT HAPPENS WITH LARGE MOLECULES?

• ENDOCYTOSIS VS. EXOCYTOSIS use Energy
• Types of endocytosis
• 1. PINOCYTOSIS
• cell drinking
• Fluid absorbed INTO cell
• 2. PHAGOCYTOSIS
• cell eating
• Food absorbed INTO cell