Flashcards · Biology · Homeostasis

Glucagon and Blood Glucose (Higher tier)

16 cards

Which hormone raises the blood glucose?

Glucagon.
Where is glucagon made?

In the pancreas.
When is glucagon released?

When the blood glucose concentration is too low.
Where does glucagon act?

On the liver.
What does glucagon make the liver do?

Convert glycogen into glucose, and release it.
What do insulin and glucagon have in common?

Both are made in the pancreas, and both act on the liver.
How do insulin and glucagon differ?

They have opposite effects on the blood glucose.
What happens to glucagon release when the glucose rises to normal?

Less glucagon is released.
When might glucose fall?

Between meals, or during exercise.
What stores glucose in the liver?

Glycogen.
Why does the glucose fall during exercise?

Muscle cells use glucose for respiration.
What is negative feedback?

A response that reverses a change.
What would happen without glucagon?

The blood glucose could fall too low, and cells would run out of fuel.
What detects a low glucose?

Cells in the pancreas.
Which organ cannot store much glucose?

The brain, so it depends on the blood supply.
Common mistake about glucagon?

Confusing it with glycogen. Glucagon is the hormone, and glycogen is the store.