Homeostasis and hormones

Controlling blood sugar level


Glucose is a sugar needed by cells for respiration. It is important that the concentration of glucose in the blood is maintained at a constant level. Insulin, a hormone secreted by the pancreas, controls blood sugar levels in the body.

Blood sugar level meter and insulin shot pen

Diabetes is a disorder in which the blood glucose levels remain too high. It can be treated by carefully maintaining a certain diet or injecting insulin. The extra insulin allows the glucose to be taken up by the liver and other tissues, so cells get the glucose they need and blood sugar levels stay normal.

Higher only

What happens when glucose levels in the blood become too high or too low

glucose leveleffect on pancreaseffect on livereffect on glucose level
too highinsulin secreted into the bloodliver converts glucose into glycogengoes down
too lowinsulin not secreted into the bloodliver does not convert glucose into glycogengoes up

Use the animation to make sure you understand how this works:

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