Biology 9700 · AS & A Level · Control and coordination in mammals
Control and coordination in mammals — practice question
Diabetes insipidus (DI) is a human disorder that makes a person very thirsty, so they drink more than usual. In one type of DI, a tumour develops in the part of the hypothalamus involved in osmoregulation.
(a(i))[2]
Explain the way in which a tumour develops in the hypothalamus.
(a(ii))[3]
Suggest how a tumour in the hypothalamus can cause a person to produce a large volume of dilute urine.
(b)[4]
In mammals, the nervous and endocrine systems work together to co-ordinate responses to changes in the internal and external environment. Table 2.1 shows some comparisons between the nervous and endocrine systems. Complete Table 2.1.
Worked solution & mark scheme
This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “mitosis occurs without control / cell cycle checkpoints are not regulated” …