Types of Transport Review The movement of particles

Types of Transport Review

The movement of particles against the direction of diffusion. ACTIVE TRANSPORT

The movement of particles from high to low concentration. DIFFUSION

The diffusion of water across a cell membrane. OSMOSIS

The movement of a substance from high to low concentration without energy. PASSIVE TRANSPORT

Type of membrane that allows ALL substances to pass through it. PERMEABLE

Type of membrane that allows only SOME substances to pass through it. SEMI-PERMEABLE (selectively)

A type of membrane that allows NO substances to pass through it. IMPERMEABLE

How does a water molecule enter and exit a cell? OSMOSIS

How does a sugar molecule enter and exit a cell? ACTIVE TRANSPORT

Can you identify two differences between active and passive transport? • TYPE OF SUBSTANCES • CONCENTRATION GRADIENT • ENERGY – YES or NO?

Can you identify the methods of transport that do NOT require energy by the cell? PASSIVE TRANSPORT • DIFFUSION • OSMOSIS

What factors can control the rate of diffusion? • TYPE OF MEMBRANE • CONCENTRATION GRADIENT • SIZE OF SUBSTANCE • TEMPERATURE • ACTIVITY LEVEL

In what direction do substances naturally travel? HIGH TO LOW CONCENTRATION

What cell structure controls diffusion and osmosis? CELL MEMBRANE

Your life depends on. . . Active Transport!