Cell Transport

Question 1

What is diffusion

Answer 1

Movement of particles from an area of higher concentration to an area of lower concentration

Question 2

What three main factors affect the rate of diffusion?

Answer 2

Concentration gradient - larger gradient, faster diffusion
Temperature - higher temperature, faster diffusion
Surface area - larger surface area, faster diffusion

Question 3

Examples of diffusion?

Answer 3

Oxygen diffuses into the blood from the lungs
CO2 diffuses into leaves through stomata

Question 4

What is osmosis?

Answer 4

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

Question 5

What is meant when a solution is isotonic to a cell?

Answer 5

The concentrations of the external and internal (inside cell) solutions are the same.

Question 6

What is meant when a solution is hypertonic to a cell?

Answer 6

The concentration of the external solution is higher than that of the internal solution (inside the cell)

Question 7

What is meant when a solution is hypotonic to a cell?

Answer 7

The concentration of the external solution is lower than that of the internal solution (inside the cell).

Question 8

What is active transport?

Answer 8

Movement of particles from low conc to high conc