Biology 5090 · O Level · Human gas exchange

Human gas exchange — practice question

Fig. 1.1 displays a student-made model used to represent the human breathing system.
(a)[2]

State the part of the model in Fig. 1.1 that stands for each of the following structures. the trachea the diaphragm

(b)[4]

Describe the ways in which this model is an inaccurate representation of the human breathing system.

(c(i))[2]

The model can be used to show breathing. Describe what the student must do to the model in order to demonstrate breathing in.

(c(ii))[1]

State what the student would observe while the model is being used to demonstrate breathing in.

(c(iii))[3]

A hole is made in the side of the rigid plastic cup, damaging the model. Describe and explain how this will alter what the student observes when the model is used to demonstrate breathing in.

Worked solution & mark scheme

This 12-mark question has a full step-by-step worked solution and mark scheme. One marking point: Straw used for drinking

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI