Cell membranes and transport 1.3 (osmosis)

Question 1

What is osmosis?

Answer 1

Diffusion of water molecules down a water potential gradient through a selectively permeable membrane.
From an area of less negative water potential to more negative water potential

Question 2

What is the water potential of pure water?

Answer 2

0kPa

Question 3

Why do all solutions have a negative water potential?

Answer 3

They have a lower proportion of water molecules compared to pure water

Question 4

What is the equation for water potential?

Answer 4

Solute potential+ Pressure potential

Question 5

What is solute potential?

Answer 5

Measure of the extent to which solute concentrations lower the water potential

Question 6

What is pressure potential?

Answer 6

Measure of the pressure that develops inside cell as a consequences of inflow of water

Question 7

What does hypertonic mean?

Answer 7

more solute, less water

Question 8

What does isotonic mean?

Answer 8

equal solute, equal water

Question 9

What is a hypotonic solution?

Answer 9

less solute, more water

Question 10

What happens to a plant cell in a hypotonic solution?

Answer 10

Turgid

Question 11

What happens to a plant cell in an isotopic solution?

Answer 11

Flaccid

Question 12

What happens to a plant cell in a hypertonic solution?

Answer 12

Plasmolyze