Biology 9700: HOMEOSTASIS Topical Past Paper Questions

(a) Insulin has an important role in the maintenance of blood glucose concentration. An investigation measured how blood glucose concentration and blood insulin concentration changed after a person had eaten a glucose-rich meal. The results are shown in Figure 5.1. Figure 5.1 (i)…

(a) When the water supply to a plant is reduced, the concentration of abscisic acid (ABA) in the leaves increases. ABA binds to receptors in the cell surface membranes of guard cells. This triggers a series of events in the cells, which results in stomatal closure. Fig. 8.1 is a…

(a) Fig. 1.1 is a diagram of a nephron. Fig. 1.1 Label Fig. 1.1 using: • one labelling line and the letter A to identify a region that contains urine • one labelling line and the letter B to identify a region that contains podocytes • one labelling line and the letter C to identi…