Question

model 2 – feedback control of blood glucose

1. when blood sugar is too high, what does the pancreas release and how does it lower blood sugar?

1. when blood sugar is too low, what hormone is released and what does the liver do?

Explanation:

1. High blood sugar triggers pancreatic insulin release. Insulin acts on the liver to convert excess glucose to glycogen for storage, reducing blood glucose levels.
2. Low blood sugar triggers pancreatic glucagon release. Glucagon acts on the liver to break down stored glycogen back into glucose, increasing blood glucose levels. Both are part of the negative feedback control of blood glucose.

Answer:

1. The pancreas releases insulin; insulin signals the liver to store glucose as glycogen, lowering blood sugar.
2. The pancreas releases glucagon; glucagon signals the liver to break down glycogen into glucose, raising blood sugar.