2.1.2 State the name of the process by which oxygen is transferred from fluid B to the cells. (1)

3. One of the characteristics of living organisms is sensitivity   3.1 Define the term sensitivity. (2)

  TOTAL QUESTION 4 [12]

  TOTAL QUESTION 5 [15]

4.1 Describe the similarities and differences between marasmus and kwashiorkor. (4)   similarities…………………………… differences………………………….  

4.2.3 The health workers provided advice to the community on ways of preventing the spread of the pathogens that cause diarrhoea. Suggest the advice that was given to the community. (3)

3.3 Scientists investigated the effect of adrenaline on blood glucose concentration in rats. The rats were put into two groups: • group A was given an injection of adrenaline • group B was given an injection that did not contain adrenaline The blood glucose concentrations of the rats in both groups were monitored for three hours after the injections. The rats did not eat for 12 hours before the investigation or while they were being monitored. The results are shown in Fig. 3.1.     Right-click on the blue button to open Fig 3.1        

  TOTAL QUESTION 2 [12]

  QUESTION 5  

5. Dialysis tubing is an artificial membrane, which is similar to the lining of the intestine. A student investigated the diffusion of glucose through dialysis tubing by using the apparatus shown in Fig. 5.1.     Right-click on the blue button to open Fig. 5.1           The student took samples of the water outside the dialysis tubing at 5 minute intervals and tested the samples with Benedict’s solution. The results are shown in Table 5.1.     time/minutes results of the Benedict’s test on the water outside the dialysis tubing 0 blue 5 green 10 yellow 15 red