cameroon gce ordinary level June 2021 human biology 2

cameroon gce ordinary level June 2021 human biology 2

cameroon gce ordinary level June 2021 human biology 2

Define the term respiration.
(ii) Distinguish between breathing and gaseous exchange.
1. (a)
(2, 4 marks)
(b) Describe the mechanism of gaseous exchange in the alveolus. (8 marks)
(6 marks)
(Total = 20 marks)
(c) State the adaptations of the alveolus to gaseous exchange.
2. (a) Name the THREE main types of neurones and state the functions of each. (6 marks)
(b) Draw a large and neatly labelled diagram of the mammalian brain. (7 marks)
(c) State the functions of the following parts of the brain:
(i) ‘ Cerebrum
(ii) Medulla Oblongata
(iii) Cerebellum. (3, 2, 2 marks)
(Total = 20 marks)

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