Review: Diffusion & Facilitated Diffusion

Front

What is Passive Transport?

Back

The movement of particles across the membrane from an area of high concentration to an area of low concentration without the use of energy.

Front

What is the direction of movement in Passive Transport?

Back

From high concentration to low concentration.

Front

Define Net Movement.

Back

The number of molecules moving in one direction minus the number of molecules moving in the opposite direction.

Front

What is Equilibrium?

Back

The condition in which all acting influences are balanced, resulting in no net movement of particles.

Front

What is Dynamic Equilibrium?

Back

A state where there is continuous movement of particles, but no overall change in concentration.

Front

What is Facilitated Diffusion?

Back

The movement of particles with the concentration gradient using protein 'helpers'.

Front

What is the general name for the movement of substances across cell membranes without energy input?

Back

Passive Transport.

Front

What is the difference between Passive Transport and Active Transport?

Back

Passive Transport does not require energy, while Active Transport requires energy to move substances against their concentration gradient.

Front

What role do proteins play in Facilitated Diffusion?

Back

Proteins act as 'helpers' to assist in the movement of particles across the membrane.

Front

What is Concentration Gradient?

Back

The difference in concentration of a substance between two areas.