Biology Topic 8 Edexcel Revision Exam Questions And Detailed Accurate Answers.

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 Equation for anaerobic respiration - correct answer glucose --> lactic acid + energy Rate of Respiration - correct answer Change in oxygen/time Cardiac Output - correct answer Stroke volume x heart rate