Biology 9700 · AS & A Level · Homeostasis in mammals
Homeostasis in mammals — practice question
Some individuals may develop a disorder named type 2 diabetes. In people with type 2 diabetes, glucose uptake from the blood is reduced. In certain cases, the pancreas is unable to produce enough insulin to maintain blood glucose concentration within a healthy range. One person with type 2 diabetes and one person without type 2 diabetes were each given a glucose drink. Blood glucose concentration for both people was recorded at regular intervals over 120 minutes. The outcomes are displayed in Fig. 6.1.
(a(i))[2]
Describe the curve shown for the person without type 2 diabetes.
(a(ii))[2]
Calculate the percentage increase in blood glucose concentration, from 0 to 60 minutes, for the person with type 2 diabetes.
(a(iii))[2]
Suggest ways in which people with type 2 diabetes can help to control their condition.
(b)[7]
Glucagon plays a part in controlling blood glucose concentration. Describe the cell signalling pathway involving glucagon, and describe how this pathway leads to a change in the blood glucose concentration.
Worked solution & mark scheme
This 13-mark question has a full step-by-step worked solution and mark scheme. One marking point: “blood glucose concentration rises until 30 minutes” …