Outline the control mechanism for appetite in humans.

Explain the possible health consequences of a diet rich in protein.

a. appetite control centre (in brain) makes person feel full/satiated/hungry;
b. function is both nervous and hormonal;
c. after eating (centre) responds to hormones/insulin from pancreas/hormones/PYY from small intestine/hormones from adipose tissue/leptin in response to fat storage;
d. centre responds to hormone/ghrelin released from empty stomach;
e. part of centre responds to levels of lipid/sugar in the blood;

a. high amount of one nutrient may cause deficiency in another one;
b. excess protein not stored as protein by the body / converted to fat;
c. results in weight/mass loss in many people (due to fat/carbohydrate deficiency);
d. health problems such as kidney stones/other health problems;
e. high protein as part of a weight/mass loss diet;

Most students could outline the control mechanism for appetite.

Few were able to achieve well in A3 (b), lacking the detail required of the consequences of protein rich diets.