At $\times 400$ magnification with a light microscope, the various blood cell types can be recognised on prepared slides of mammalian blood. Fig. 4.1 provides a guide for identifying the different blood cell types on prepared slides of mammalian blood. In Fig. 4.1, letters C, D, E and F denote four separate blood cell types.
(a(i))[3]
Identify the cell types shown as C, D, E and F in Fig. 4.1.
(a(ii))[2]
Explain why blood from a person with an infectious disease may contain a different number of white blood cells from blood from a healthy person.
(b)[4]
Compare the day 1 results with the day 14 results in Table 4.1 and explain the result shown for day 14.
(c)[2]
The findings of the research project have improved understanding of diseases such as sickle cell anaemia. Explain why sickle cell anaemia is an example of a disease.
Worked solution & mark scheme
This 11-mark question has a full step-by-step worked solution and mark scheme. One marking point: “C = red blood cell, D = lymphocyte, E = monocyte, F = neutrophil” …