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6.3 Monitoring and maintaining health

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Question 21

The human body utilises a range of non-specific physical and chemical barriers to prevent the entry and establishment of pathogens.

Chemical defense in tearsMechanical defense in the tracheaAAmylasePhagocytosis by neutrophilsBLysozymeCiliary movement of mucusCHydrochloric acidKeratinisation of cellsDSebumProduction of hydrochloric acid \begin{array}{c|c|c} & \text{Chemical defense in tears} & \text{Mechanical defense in the trachea} \\ \hline \text{A} & \text{Amylase} & \text{Phagocytosis by neutrophils} \\ \hline \text{B} & \text{Lysozyme} & \text{Ciliary movement of mucus} \\ \hline \text{C} & \text{Hydrochloric acid} & \text{Keratinisation of cells} \\ \hline \text{D} & \text{Sebum} & \text{Production of hydrochloric acid} \end{array} ABCD​Chemical defense in tearsAmylaseLysozymeHydrochloric acidSebum​Mechanical defense in the tracheaPhagocytosis by neutrophilsCiliary movement of mucusKeratinisation of cellsProduction of hydrochloric acid​​

Which row in the table correctly identifies the primary chemical defense substance found in tears and the primary mechanical defense mechanism operating in the trachea?

A

Row A\text{A}A

B

Row B\text{B}B

C

Row C\text{C}C

D

Row D\text{D}D

Markscheme

6.3 Monitoring and maintaining health Questions

  1. GCSE
  2. /Biology
  3. /6.3 Monitoring and maintaining health

97 exam-style questions on OCR GCSE Biology 6.3 Monitoring and maintaining health, covering 6.3.1 Health and disease, 6.3.2 Interactions between diseases, 6.3.3 Spread of communicable diseases, 6.3.4 Common infections and diseases, 6.3.5 Physical plant defence responses, 6.3.6 Chemical plant defence responses, 6.3.7 Detecting and identifying plant diseases, 6.3.8 White blood cells and platelets, 6.3.9 Non-specific defence systems, 6.3.10 The immune system, 6.3.11 Monoclonal antibodies, 6.3.12 Vaccines and medicines, 6.3.13 Aseptic techniques, 6.3.14 Discovery and development of new medicines, 6.3.15 Causes of non-communicable diseases, 6.3.16 Treatments for cardiovascular disease, 6.3.17 Lifestyle factors and non-communicable diseases, 6.3.18 Cancer, 6.3.19 Stem cells in medicine, 6.3.20 Gene technology in medicine, and 6.3.21 The human genome and medicine. Each one has a worked solution and a mark scheme showing where the marks go.

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