CH 5 Definitions

Question 1

Define Selectively Permable Membrane

Answer 1

A membrane that allows only certain substances to pass through it

Question 2

Define Diffusion

Answer 2

The movement of particles from an area of higher concentration to an area of lower concentration

Question 3

Define Concentration Gradient

Answer 3

A difference in concentration of a substance between two areas

Question 4

Define Osmosis

Answer 4

The diffusion of water across a selectively permeable membrane from an area of higher water concentration (or low solute concentration) to an area of lower water concentration (or high solute concentration)

Question 5

Define Turgor Pressure

Answer 5

The outward pressure that is exerted on a plant cell wall by the cell contents when water is taken in by Osmosis

Question 6

Define Endocytosis

Answer 6

The process by which a cell moves large amounts of material, or non-dissolved particles, into its cytoplasm from the outside environment

Question 7

Define Phagocytosis

Answer 7

A type of endocytosis in which a cell uses pseudopods to move non-dissolved solid particles into its cytoplasm from the outside environment

Question 8

Define Exocytosis

Answer 8

The process by which large amounts of material, or large non-dissolved particles, are moved from a cell’s cytoplasm to the outside environment

Question 9

Define Permeable

Answer 9

Allowing passage

Question 10

Define Impermeable

Answer 10

Not allowing passage