3.1,3.2,3.3 movement in cells

Question 1

osmosis

Answer 1

• the net movement of water molecules
  -(dilute solution) high water potential to (concentrated solution) low water potential down a conc gradient
• through a partially permeable membrane
• until an equilibrium is reached

Question 2

diffusion

Answer 2

• net movement of particles
• high to low concentration down a concentrated gradient
• as a result of their random movement

Question 3

active transport

Answer 3

• movement of particles through a cell membrane
• from low to high concentration against concentration gradient
• requires energy
• have protein carriers move molecules or ions across membrane

Question 4

diffusion in liquid

Answer 4

different molecules placed inside water molecules - high conc of diff molecules
diff molecules start to diffuse to water molecule - low conc of diff molecules
until it reaches an equilibrium - equal conc

Question 5

factors affecting diffusion rates

Answer 5

bigger surface area = diffusion faster
higher temperature = diffuse faster
higher gradient = diffuse faster
smaller size of particles = diffuse faster