The bacteria responsible for tuberculosis (TB) may be present in several body tissues, including the lungs.
(a(i))[1]
State the bacterium’s name that causes TB.
(a(ii))[3]
The pathogen in the lungs draws phagocytes to the infected area. These phagocytes release elastase, which digests elastin.
Many people with TB feel tired all the time.
Suggest and explain how the effect of phagocytes on lung tissues causes people to feel tired all the time.
(b)[5]
Discuss the biological and social factors that make TB hard to control.
Worked solution & mark scheme
This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Mycobacterium tuberculosis, or Mycobacterium bovis as an acceptable alternative” …