(a)[4]
A human body temperature is kept near its set point of about $37^{\circ}\text{C}$. When it goes above this level, physiological responses start to bring it back to the set point. Vasodilation and sweating are two such responses. Explain how vasodilation and sweating help to return the body temperature to its set point.
(b)[4]
Diabetes mellitus is a disease in which the pancreas cannot secrete enough insulin. The symptoms of diabetes mellitus include drinking a lot of water and losing body mass. Suggest why these symptoms occur.
(c(i))[3]
Outline how a glucose biosensor works.
(c(ii))[1]
Suggest one advantage of using a biosensor instead of a dip stick.