Movement of particles

Question 1

Characteristics of passive transport

Answer 1

-Doesn’t require energy
-From high to low concentration of particles
-It includes Osmosis and Diffusion

Question 2

Explain diffusion

Answer 2

-It is spreading out of particles from an area of higher to lower concentration
-The movement of particles is random
-In gasses and solutions
-Doesn’t need cell membranes, partially permeable, because only some particles can diffuse through them, generally small molecules
-Passive transport
-Concentration gradient, surface area and teperature affects rate of diffusion
-Example: CO2 diffuses out of cell and Glucose and O2 into cell

Question 3

Explain Osmosis

Answer 3

-Special case of diffusion
-Passive transport
-It is the movement of water molecules through a partially permeable membrane from an area of higher to lower concentration
-In solutions(water concentration = amount of H2O in solution compared to solutes)
-Across partially permeable membrane
-Solutes DON’T move
-Example: Water diffuses through cell membrane into cell because there is a low concentration inside

Question 4

Explain active tranport

Answer 4

-It is the movement of particles from an area of lower to higher concentration
-Requires energy, from cellular respiration.
-Requieres specialized proteins
-Needs membrane
-Example: Root hair cells use energy to transport magnesium from soils to cell.