Fig. 1.1 and Fig. 1.2 each present images of villi.
Fig. 1.1 is a surface image of many villi taken using a scanning electron microscope.
Fig. 1.2 is a light-microscope section through one villus.
(a)[1]
State what the function of villi is.
(b)[4]
Identify and describe two of the labelled parts of a villus. Use the letters from Fig. 1.2 in your response.
(c(i))[2]
Describe the effects of diarrhoea on the body.
(c(ii))[1]
State the treatment for the effects of severe diarrhoea.
(d(i))[1]
State the blood component that carries nutrients.
(d(ii))[1]
State the name of this process.
(d(iii))[2]
State two examples of larger molecules in cells that are made from amino acids.
Worked solution & mark scheme
This 12-mark question has a full step-by-step worked solution and mark scheme. One marking point: “absorption of digested food/water or transfer of (small) molecules from intestine into blood” …