10. The diagram shows the human heart with four chambers and… 10. The diagram shows the human heart with four chambers and four blood vessels labelled A to H. Right-click on the button below to open the image in a new tab: Read Details
9.4 Explain the role of ADH when there is too little water… 9.4 Explain the role of ADH when there is too little water in the blood. (5) Read Details
10.4 When a person is vaccinated, their immune system prod… 10.4 When a person is vaccinated, their immune system produces memory cells. Describe the role of memory cells. (3) Read Details
7.7 State two factors that should be kept constant in this… 7.7 State two factors that should be kept constant in this investigation. (2) Read Details
2.2 Anaerobic respiration in muscles release carbon dioxid… 2.2 Anaerobic respiration in muscles release carbon dioxide. (1) Read Details
10.2 Explain why the walls of the right and left ventricle… 10.2 Explain why the walls of the right and left ventricles differ in thickness. (2) Read Details
2.5 Plants are able to carry out photosynthesis because th… 2.5 Plants are able to carry out photosynthesis because they contain the organelle known as a(n) mitochondrion. (1) Read Details
