Insulin: IGCSE EDEXCEL Biology

In which organ is insulin produced ?

• Liver

• Pancreas

• Gall bladder

What is the name of the hormone produced in the pancreas that is involved in the control of blood glucose concentration?

If blood glucose concentration gets too high , what will happen?

• • The pancreas produces the hormone glucagon

• • The pancreas produces the hormone insulin, secreting it into the blood

If blood glucose concentration gets too low, what will happen?

• • The pancreas produces the hormone glucagon

• • The pancreas produces the hormone insulin, secreting it into the blood

Insulin will stimulate which two of the following to take up glucose from the blood and store it as glycogen?

• Pancreas

• Liver

• Muscle cells

• All body cells

What is the role of Glucagon hormone?

• stimulates muscles and the liver to take up glucose from the bloodstream and store it as glycogen

• • causes the glycogen stored in the liver to be converted into glucose and released into the blood

• Glucagon causes the glycogen stored in the liver to be converted into glucose and released into the blood.

• This will result in

• reducing the concentration of glucose in the blood back to normal levels

• increasing the concentration of glucose in the blood back to normal levels

• If the blood glucose concentration gets too high:

  • Cells in the pancreas detect the increased blood glucose levels

  • The pancreas produces the hormone insulin, secreting it into the blood

  • Insulin stimulates muscles and the liver to take up glucose from the bloodstream and store it as glycogen (a polymer of glucose)

  • What will this do?

• • This increases the concentration of glucose in the blood back to normal levels, at which point the pancreas stops secreting insulin

• • This reduces the concentration of glucose in the blood back to normal levels, at which point the pancreas stops secreting insulin