2010年11月IB生物SL真题下载-Paper3
A1. Rickets, caused by a defective vitamin D receptor (VDR), can be prevented by high calcium intake. A series of experiments were performed to test this. The results are shown in the graphs.
Graph A shows the change in blood calcium levels after calcium administration in normal mice with and without addition of vitamin D. It also shows the change in blood calcium levels in mutant mice, which lack the vitamin D receptor.
Graph B shows the change in blood calcium levels after calcium administration in normal mice after being subjected to one week of low, medium and high calcium diets.
(a) State the change in blood calcium levels in normal mice 10 minutes after the administration of calcium, with and without the addition of vitamin D.
With vitamin D:
Without vitamin D:
(b) Compare the changes in blood calcium levels in normal mice and in mutant mice after the administration of calcium.
(c) Explain, using graph B, the changes in blood calcium levels for the mice with different diets.
(d) Discuss whether the scientists were able to support their hypothesis that rickets caused by the defective vitamin D receptor can be prevented by the intake of large amounts of calcium.
A2. (a) (i) Outline the function of the appetite control centre in the brain.
(ii) Outline the implications for the health of a person who has a BMI of 16 kg m–2.
(b) List, by completing the table below, the differences between human milk and artificial milk when feeding babies.
A3. Discuss the consequences of products with high food miles.
2010年11月IB生物SL真题余下省略！
你可能还关注