Movement of substances into and out of cells

Question 1

Describe and explain the process of diffusion

Answer 1

The net movement of particles from a region of high concentration to a region of low concentration

Question 2

What is active transport?

Answer 2

The movement of substances from a more dilute to a more concentrated solution AGAINST the concentration gradient

Question 3

Fill in the gap:

Active transport requires energy from _______

Answer 3

Respiration

Question 4

Name two differences between active transport and diffusion

Answer 4

1) Diffusion does NOT require energy, active transport DOES require energy from respiration
2) In active transport, the particles move AGAINST the concentration gradient; in diffusion, particles move DOWN the concentration gradient

Question 5

Describe what’s meant by osmosis

Answer 5

The diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane