AQA GCSE Biology Paper 2

Hormones have longer lasting effects compared to electrical impulses. Nerves act on a very specific area whereas hormones act more general. What does the thyroid gland do? - Produces thyroxine which is involved in regulating metabolism. What do the adrenal glands do? - Produce adrenaline which is used to prepare the body for fight or flight. What is the role of the pancreas? - Produces glucagon and insulin which are involved in regulating glucose levels in the blood. Name the hormone that is released if blood sugar is too high. - Insulin What does insulin do? - It makes the liver convert glucose into glycogen. This causes blood glucose levels to decrease. Name the hormone that is released if blood sugar is too low. - Glucagon What does glucagon do? HINT GLU-COSE-GONE - It makes the liver convert glycogen to glucose. This causes the blood glucose level to increase. What is type I diabetes? - When the pancreas produces little or no insulin. What is type II diabetes? - When a person becomes resistant to their own insulin. Being overweight can