7.7.2b Respiratory Structure and Breathing Mechanisms in Humans and Animals (Structured Question 2 & 3)

Question 2:(a) Sugar is oxidized during respiration.Explain the process. (4 marks)(b) After an athlete finished running a race, his breathing is still fast and deep for several minutes. (6 marks)Explain why.(c) State the similarities and differences between the human and the grasshopper’s respiratory system based on the structural adaptation to maximize the rate of gaseous … Read more

7.7.2a Respiratory Structure and Breathing Mechanisms in Humans and Animals (Structured Question 1)

Question 1:Figure I represents a model of the human lungs in the respiratory mechanism.(a) Based on the model of the lungs in Figure I, what are the equivalent structures to the glass tube and the bell jar in the human respiratory system?Glass tube: __________Bell jar: ____________(2 marks)(b)(i) The thin rubber sheet represents the diaphragm in … Read more

7.7.1 The Respiratory Process in Energy Production (Structured Question 1 & 2)

Question 1:Diagram below shows a type of organelle found in muscle cells.A biochemical reaction occurs in the organelle.(a)(i) Name this organelle. [1 mark](ii) Explain why membrane W is in the form of numerous folded layers. [2 marks](b) The biochemical reaction that occurs in this organelle is summarized as follows:(i) Name gas R. [1 mark](ii) Name product … Read more