Cell Membrane: Transport What goes in? What goes out?

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Presentation transcript:

Cell Membrane: Transport What goes in? What goes out?

Cell membrane – Lipid bilayer that controls flow of materials into and out of the cell. Fluid mosaic model

Passive Transport - No Energy Required Active Transport – Energy Required

Passive transport Diffusion Facilitated Diffusion Osmosis

PASSIVE - DIFFUSION Particles move from areas of high concentration to low concentration. (Down concentration gradient) Particles spread evenly. Does NOT require energy. (Natural movement of molecules)

PASSIVE - DIFFUSION Particles move from areas of high concentration to low concentration. (Down concentration gradient) Particles spread evenly. Does NOT require energy. (Natural movement of molecules)

PASSIVE - Facilitated diffusion Charged and large particles can be carried through protein channels. Fast and specific Move from high to low concentration

Passive - osmosis Diffusion of WATER through a selectively permeable membrane. When the particles are too big to fit through the membrane, WATER moves across the membrane.

OSMOSIS or DIFFUSION?

OSMOSIS or DIFFUSION?

OSMOSIS or DIFFUSION?

OSMOSIS or DIFFUSION?

OSMOSIS or DIFFUSION?

OSMOSIS or DIFFUSION?

OSMOSIS or DIFFUSION? Amoeba Sisters - Osmosis

Passive Transport - No Energy Required Active Transport – Energy Required

ACTIVE transport Active transport requires energy (ATP). Materials move from low to high concentration (against gradient).

Endo & Exocytosis Endocytosis – large/bulk materials taken in by cell membrane pockets Exocytosis – large/bulk materials leaving the cell through membrane pockets

Amoeba Sisters - Membrane Transport Crash Course - Membrane Transport