explain how insulin controls the blood sugar level in the body
explain how insulin controls the blood sugar level in the body
**explain how glucagon and insulin work together to control the blood sugar level in the body **
compare type 1 and type 2 diabetes and explain how they can be treated
a) explain how the main structures of the eye are related to their functions, including the cornea, iris, lens, ciliary muscle and retina and to include the use of ray diagrams
b) describe practical investigations into the response of the pupil in different light conditions PAG6
describe common defects of the eye, including short-sightedness, long-sightedness and cataracts, and explain how these problems may be overcome, including using ray diagrams to illustrate the effect of lenses
**explain some of the limitations in treating damage and disease in the brain and other parts of the nervous system **