0654.B13.1.05 — Describe a simple reflex arc in terms of: receptor, sensory neurone, relay neurone, motor neurone and effector: past paper questions
Real questions on 0654.b13.1.05 — describe a simple reflex arc in terms of: receptor, sensory neurone, relay neurone, motor neurone and effector
The newest 9 of 9 written questions. Open one to see it on the real paper.
- 0973/31 · May/June 2026 · Q1a(ii)[2]
Complete the flow chart, using letters P—S from Figure 1.1, to describe the reflex arc. stimulus y relay neurone effector response
See it on the paper → - 0973/42 · May/June 2025 · Q3b[3]
Complete the sentences about an immune response to a flu virus infection. Use words from the list. active lymphocytes antibodies passive enzymes pathogens phagocytes The flu virus has antigens on its surface. Proteins with a specific shape bind to antigens. These proteins are called . This causes the virus to be destro...
See it on the paper → - 0973/42 · May/June 2025 · Q3c[3]
Flu vaccinations are used each year to protect people from flu virus infection. Outline how this vaccine gives protection.
See it on the paper → - 0973/42 · May/June 2025 · Q3d[2]
The flu virus reproduces quickly and often mutates. Suggest why a new vaccine is developed every year.
See it on the paper → - 0973/31 · May/June 2023 · Q10a(ii)[1]
State the name of the neurone labelled X in Fig. 10.1.
See it on the paper → - 0973/32 · May/June 2022 · Q1a(iii)[2]
Motor neurones are part of a reflex arc. Name the two other neurones found in a reflex arc.
See it on the paper → - 0973/32 · May/June 2022 · Q1b(ii)[2]
This reaction is a voluntary reaction. This is similar to a reflex arc but involves the brain. In this reaction, suggest the name of the: effector coordinator.
See it on the paper → - 0973/41 · October/November 2019 · Q3b(i)[2]
Show that the combined resistance of hotplates A and B connected in parallel is 30 Ω.
See it on the paper → - 0973/41 · October/November 2019 · Q3b(ii)[1]
State the combined resistance of hotplates C and D connected in parallel. Ω
See it on the paper →
What examiners said
Candidates found this topic more demanding. The proteins were often given as phagocytes or lymphocytes rather than antibodies; lymphocytes were often given in place of phagocytes and passive given in place of active.
— Examiner report, May/June 2025, 0973/42 Q3(b) (Cambridge)
Candidates generally were able to state that vaccination contains a weakened version of the flu virus. Fewer were able to explain how this triggers an immune response and long-term immunity. There was some confusion between antigens and antibodies. Candidates should take care to ensure they are using the correct scientific terminology.
— Examiner report, May/June 2025, 0973/42 Q3(c) (Cambridge)
This question proved demanding for all but the strongest candidates. A significant number of candidates tried unsuccessfully to explain this in terms of natural selection and the development of resistance. The best responses referred to changing shapes of antigens and the need for new antibodies to match them.
— Examiner report, May/June 2025, 0973/42 Q3(d) (Cambridge)
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