Sb1i Transporting Substances

Question 1

Diffusion definition

Answer 1

The net movement of particles from a area of high concentration to low concentration

Question 2

What are the three factors that effect the rate of diffusion

Answer 2

Concentration gradient ( the difference in concentration between two places )
Temprature
Surface area ( higher surface area higher rate of diffusion

Question 3

Osmosis definition

Answer 3

Net movement of water molecules across a partially permeable membrane from a region of higher water concentration to a region of lower

Question 4

What type of process is active transport vs diffusion

Answer 4

Active transport is an active process meaning it requires energy from the cell . Diffusion however is passive meaning it does not require any energy

Question 5

Define active transport

Answer 5

The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration and requiring energy from cellular respiration