Ordinary level 2026 South West regional mock human biology 2

SECTION A

ANSWER THREE QUESTIONS FROM THIS SECTION.

1.

• a) State six distinguishing characteristics of mammals (6 marks)

• b) (i) What is a specialized cell? (2 marks)

• (ii) Name three specialized cell types in the human body and state an adaptation for each one. (2 marks)

• c) Describe the structure, state a location and a specific function of the following muscular tissues.

  • (i) Smooth muscle

  • (ii) Cardiac muscle.

    (3, 3 marks)

    (Total = 20 marks)

2.

• a) What is the main difference between breathing and respiration? (2 marks)

• b) State the characteristics of a good respiratory surface (4 marks)

• c) Draw a large and neatly labelled diagram of the structure of the human respiratory system. (6 marks)

• d) Describe the mechanism of lung ventilation in humans. (8 marks)

  (Total = 20 marks)