Exam-style Questions: Respiration

  1. What is the:

    a) definition of respiration?

    b) equation of respiration?

    (Marks available: 2)

    Answer

    Answer outline and marking scheme for question: 1

    a) The process of releasing energy from food.

    (1 mark)

    b) glucose + oxygen -> carbon dioxide + water + energy.

    (1 mark)

    (Total = 2 marks)

  2. Which 2 organs of the body use glucose as fuel?

    (Marks available: 2)

    Answer

    Answer outline and marking scheme for question: 2

    • The heart
    • The brain

    (Total = 2 marks)

  3. The intercostal muscles are very important in the process of breathing.

    a) Where are they located?

    b) What do they do?

    (Marks available:2 )

    Answer

    Answer outline and marking scheme for question: 3

    a) Small muscles between the ribs.

    (1 mark)

    b) They pull the ribcage up and outwards.

    (1 mark)

    (Total = 2 marks)

  4. When we breathe in air, it enters the lungs down the ___(i)___, which branches into the right and left ___(ii)___. Each ___(iii)___ then divides further into ___(iv)___. After about 20 branchings, you reach the ___(v)___.

    (Marks available: 5)

    Answer

    Answer outline and marking scheme for question: 4

    (i) trachea;

    (ii) bronchi;

    (iii) bronchus;

    (iv) bronchioles;

    (v) alveoli.

    (Total = 5 marks)