Biology Topic 8 Edexcel Revision
Oxygen and Carbon dioxide Exchange point - correct answer Alveoli in Lungs
Water and Urea Exchange point - correct answer Nephrons in kidney
Dissolved food molecules and mineral ions Exchange point - correct answer
Small Intestine
Factors affecting diffusion - correct answer Concentration Gradient, Distance
moved, Surface Area
Fick's Law - correct answer Rate of diffusion !Proportional to! (Surface Area x
Concentration Difference) / Thickness of Membrane
Plasma use - correct answer Carries blood cells through blood vessels, many
dissolved substances such as Glucose
White Blood Cells use - correct answer Attacks pathogens in the body
Platelets use - correct answer Cause blood clots
Red Blood Cells use - correct answer Carry oxygen around the body
3 types of blood vessels - correct answer arteries, veins, capillaries
Equation for aerobic respiration - correct answer glucose + oxygen → carbon
dioxide + water + energy
