Diseases are classified into categories. It is sometimes appropriate to classify a disease into more than one category.

1. Indicate which of the following diseases fit into the categories infectious, deficiency and degenerative.

   Question:
   

   1. cholera

      Answer:

      cholera : infectious

      
      Question:
      

   2. night blindness

      Answer:

      night blindness : deficiency and /or degenerative; ?

      
      Question:
      

   3. lung cancer

      Answer:

      lung cancer : degenerative; ?

      
      Question:
      

   4. stroke

      Answer:

      stroke : degenerative ? one mark per disease

      
      
   [4]
   
2. Question:
   

   1. State one example of an inherited disease.

      [1]
      

      Answer:

      cystic fibrosis / haemophilia / sickle cell anaemia / Huntington's / PKU / AW;

      
      Question:
      

   2. Explain why the disease you name is classified as an inherited disease.

      [3]
      

      Answer:

      check answer against example given in (i), but mark independently from (i) if example given in (i) is incorrectcaused by, genes / DNA;(gene) mutation;passed from parents to child / AW; NOT inheritedvia gametes;parents may be carriers;or have the disease;caused by, (2) recessive alleles / dominant allele; (A) gene for allele

      
      

   Some diseases are classified as self-inflicted diseases. Smoking is considered by the World Health Organisation to be a self-inflicted disease of epidemic proportions.

   Question:
   

3. State what is meant by a self-inflicted disease.

   [1]
   

   Answer:

   person's, own actions / choices / lifestyle, put them at risk of diseases;

   
   Question:
   

4. Suggest why the World Health Organisation considers smoking to be a disease of epidemic proportions.

   [1]
   

   Answer:

   (very) large number of people smoke / smoking occurs worldwide / AW;can cause, disease / smoking-related diseases / named disease;rapid increase; (e.g. in developing world)