GEN BIO: DIFFUSION AND OSMOSIS

Question 1

Active transport

Answer 1

Requires energy in the form of ATP to move substances across the membrane

Question 2

Passive transport

Answer 2

Does not require energy and makes use if diffusion and filtration.

Question 3

Diffusion

Answer 3

Particles move in random manner from an area of high concentration to an area of low concentration

Question 4

Osmosis [specific type of diffusion of water]

Answer 4

Water moves from an area of high water concentration (low particle concentration), to an area of low water concentration (high particle concentration).

Question 5

Isotonic solution

Answer 5

-Solute concentration of the water is the same as that inside of the cell
-The amount of water that exits and enters the cell is equal

Question 6

Hypertonic solution

Answer 6

-Solute is more concentrated outside the cell than inside it
-Water leaves the cell due to osmosis; it moves from the high-water/low-particle concentration to low-water/high-particle concentration—as a result the cell shrinks

Question 7

Hypotonic solution

Answer 7

-Solute concentration outside the cell is lower than that inside the cell
-Water flows into the cell from high-water/low-particle concentration to low-water/high-particle concentration

Question 8

Filtration

Answer 8

Movement of water and solutes through the membrane by fluid or hydrostatic pressure.

Question 9

Osmosis and Red Blood Cells