10. Diseases and immunity
A section of Biology, 0610
Listing 10 of 182 questions
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 . rubber band to secure the dialysis tubing water outside the dialysis tubing knot at the end of the dialysis tubing glucose solution dialysis tubing 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 3.1. Table 3.1 time / minutes results of the Benedict’s tests on the water outside the dialysis tubing blue green yellow red Describe and explain the results shown in Table 3.1. The student repeated the investigation with a higher concentration of glucose in the dialysis tubing. Predict the results that the student would observe. shows a drawing of a cell from the lining of the small intestine. The lumen is the space inside the intestine where food is digested. A C B not to scale lumen of the intestine State the names of the three labelled structures in and describe the role of each structure in the intestinal cell. The cholera bacterium can survive in the small intestine and the large intestine. The bacterium releases a toxin that interacts with receptors on the surface of cells. shows the effect of the toxin. The arrows indicate the direction of movement. Key: toxin ion X bacterium not to scale lumen of the intestine The toxin stimulates the secretion of ion X out of the intestinal cell. State the name of ion X. Describe the effects on the body of the secretion of ion X into the lumen of the intestine.
0610_s20_qp_41
THEORY
2020
Paper 4, Variant 1
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Questions Discovered
182