EXTRA SPACE TO WRITE. USE THIS SPACE ONLY IF NEEDED  

5.2.1 Explain a safety precaution that should be taken when carrying out this test. (2)

9.14 Muscles are responsible for the ventilation of the lungs during breathing. Which row describes their action during the inspiration of air? (1)   diaphragm muscles external intercostal muscles internal intercostal muscles A contract contract relax B contract relax contract C relax contract relax D relax relax contract  

7.3 Explain why the pressure of the blood returning to the fish heart is lower than the pressure of the blood returning to the human heart. (2)

  SPACE TO UPLOAD EXTRA NOTES. USE THIS SPACE ONLY IF NEEDED  

9.5 Four solutions were tested to see whether they contained protein, starch or glucose. The colours of the solutions after the tests are recorded in the table. Which solution contained protein and glucose but not starch? (1)   biuret test iodine test Benedicts’s test A blue brown orange B blue blue-black blue C purple brown orange D purple blue-black blue    

  TOTAL QUESTION 6  [8]

QUESTION 7  

4. A person touches a sharp pin.     The diagram shows the reflex arc involved in the response to this stimulus.     Right-click on the following button to open Figure 4.1         4.1.1 Name the parts labelled A, B, C and D.     [partA] [partB] [partC] [partD] (4)

  TOTAL QUESTION 9  [16]