Controlling blood glucose

What is Homeostasis?
Homeostasis - involves maintaining a constant environment in the body
Homeostasis makes sure our body has the correct levels of;
Temperature
Carbon dioxide
Oxygen
Water
Blood sugar

Recap: What is a hormone?
A chemical
Hormones are secreted from our glands into the bloodstream.
Travel in blood to target organs
Regulate the functions of many organs and cells
Coordinate many processes in the body
Which gland produces the hormone insulin?
Pancreas

Hormones generally produce a slower reaction than nerve impulses – Why?
Hormones co-ordinate long-term changes such as maturation
Hormones have to be made and then released from cells where they need to travel to their target organs in the blood
Nerve impulses are generated quickly and travel directly to the effectors

The Pancreas
Insulin controls........
Glucose is a sugar needed by cells for Respiration.
It is important that the concentration of glucose in the blood is kept at a constant level.
blood sugar levels in our bodies.

Changing glucose levels
After a meal the level of glucose in our bodies [increases]?
After exercise the levels of glucose in our bodies [decreases]?
Why do you think this happens?

Controlling Blood Glucose Levels
Insulin produced by the _________ travels in the _____ to the liver and causes it to take up excess _______and store it as________.
________ is released by the pancreas and causes _________ in the liver to be converted back to glucose
Glucose rises due to_______
Glucose falls due to_______

Controlling Blood Glucose Levels
Normal blood
glucose level.
Normal blood
glucose level.
Insulin produced by the _________ travels in the _____ to the liver and causes it to take up excess _______and store it as________.
________ is released by the pancreas and causes _________ in the liver to be converted back to glucose
Glucose rises due to_______
Glucose falls due to_______
pancreas
glucose
glycogen
Glucagon
glycogen
blood
eating
exercise

What would happen if my pancreas did not produce enough insulin?

Symptoms of Diabetes
Glucose in urine

Thirsty

Tiredness

People with diabetes test their blood to see how much glucose is in it and inject with insulin accordingly

Use the internet have given you to fill in the table about diabetes
Extension: How is the insulin that is injected by diabetics produced?