Biology 0610 · IGCSE · Diseases and immunity

Diseases and immunity — practice question

Statements 1-4 outline the stages involved in the development of cholera. 1. Chloride ions are released into the gut. 2. Osmosis makes water move into the gut. 3. The infected person develops dehydration. 4. The pathogenic bacteria produce toxins. What is the correct order of these four stages?

  • A$1 \rightarrow 2 \rightarrow 3 \rightarrow 4$
  • B$1 \rightarrow 4 \rightarrow 3 \rightarrow 2$
  • C$4 \rightarrow 1 \rightarrow 2 \rightarrow 3$
  • D$4 \rightarrow 1 \rightarrow 3 \rightarrow 2$

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