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Review Transport with video

• Quick video reviewing transport – and introducing Active Transport

Cell Transport

Passive Transport

Active Transport

Diffusion

Osmosis

FacilitatedDiffusion

No Energy

Movement of particles down a concentration gradient

Movement of particles down a concentration gradient

Movement of water down a concentration gradient

Movement of water down a concentration gradientDiffusion w/ the help of a carrier protein

Diffusion w/ the help of a carrier protein

Active Transport

• Requires the cell to use energy.• Moves materials against the concentration gradient.• 3 Types

• Pumps (Na+ - K+ Pump)• Endocytosis• Exocytosis

Na+ - K+ Pump

• Sodium is pumped (energy) out.

• Potassium comes through as a byproduct.

Endocytosis

• Uses energy to pinch in the plasma membrane to bring in large quantities of particles.

Kinds of Endocytosis

• Pinocytosis – Brings in fluids and small particles

• Phagocytosis – Takes in larger things such as bacteria

Exocytosis

• Uses energy to remove large quantities of particles by fusing a vesicle to the plasma membrane.

Endocytosis and Exocytosis

Cell Transport

Passive Transport

Active Transport

Diffusion

Osmosis

FacilitatedDiffusion

Na+- K+

Pump

Exocytosis

Endocytosis

Needs Energy

Uses energy to move Na+ out of the cell against the concentration gradient.

Uses energy to move Na+ out of the cell against the concentration gradient. Pinches

plasma membrane to bring in large amounts of stuff.

Pinches plasma membrane to bring in large amounts of stuff.

Fuses vesicle to plasma membrane to rid the cell of stuff.

Fuses vesicle to plasma membrane to rid the cell of stuff.