The diagram presents a cross-section through a human molar tooth.
(a(i))[1]
State the role of a molar tooth.
(a(ii))[4]
The pulp is living tissue.
Describe how molecules move in the pulp between the blood capillaries and the cytoplasm of the surrounding cells.
(b)[5]
Toothache often results from inflammation of the pulp tissue and can be a sign of dental decay.
Describe the cause of dental decay and how it may be prevented.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “crushing/grinding/chewing raises the surface area of food” …