Movement of substances into and out of cells

Question 1

Active transport

Answer 1

The movement of substances from a more dilute solution to a more concentrated solution (against the concentration gradient) with the use of energy from respiration

Question 2

Concentration gradient

Answer 2

The difference in concentration between two areas

Question 3

Diffusion

Answer 3

The movement of individual molecules of a substance through a semipermeable barrier from an area of higher concentration to an area of lower concentration

Question 4

Osmosis

Answer 4

The diffusion of water molecules from a more dilute solution to a more concentrated solution across a partially permeable membrane

Question 5

Surface area to volume ratio (SA:V)

Answer 5

The size of the object compared with the amount of area that contacts the environment.