Diffusion

Question 1

Describe diffusion

Answer 1

Movement of particles from high to low concentration

Question 2

Factors affecting diffusion

Answer 2

Higher temp
= higher diffusion
= particles have more kinetic energy
= particles move faster
Surface area of cell membrane larger
= more diffusion
Greater concentration gradient
= faster diffusion

Question 3

Define osmosis

Answer 3

Diffusion of water from dilute to concentrated solution through partially permeable membrane

Question 4

Define active transport

Answer 4

Move substances from low to high concentration against the concentration gradient
Requires energy from respiration

Question 5

Difference between active transport and diffusion

Answer 5

Diffusion
= particles move down concentration gradient
= doesn’t require energy

Active transport
= particles live against concentration gradient
= require energy