Types of Transport Review

The movement of particles against the direction of

diffusion requiring cell energy.

ACTIVE TRANSPORT

True or False?

During diffusion molecules tend to move down the concentration gradient.

TRUE

DIFFUSION

General transport method by which most molecules move

across the membrane.

DIFFUSION

A difference in concentration across a cell’s membrane.

CONCENTRATION GRADIENT

Endocytosis of solid substances like bacteria and food.

PHAGOCYTOSIS

FACILITATED DIFFUSION

A liquid mixture that involves the combination of a solvent

with a solute.

SOLUTION

Active transport of molecules out of a cell.

EXOCYTOSIS

HYPERTONIC

The movement of particles from high to low concentration.

DIFFUSION

An equal amount of a substance inside the cell and the environment the cell is

living in.

ISOTONIC

OSMOSIS

The diffusion of water across a cell membrane.

OSMOSIS

Endocytosis of liquids.

PINOCYTOSIS

Active transport of molecules into a cell.

ENDOCYTOSIS

The substance dissolved in the liquid part of the solution.

SOLUTE

HYPOTONIC

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

ACTIVE TRANSPORT

The liquid into which the solute is dissolved.

SOLVENT

To be in balance or in a state of equality.

EQUILIBRIUM

Type of membrane that allows only SOME substances to pass

through it.

SEMI-PERMEABLE(selectively)

More solute, less water inside the cell than the environment

the cell is living in.

HYPOTONIC

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 do most sugar molecules enter and exit a cell?

ACTIVE TRANSPORT

ACTIVE TRANSPORT

More solute, less water outside the cell than inside the cell.

HYPERTONIC

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

ISOTONIC

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!