ZoologyUnder which of the following circumstances will insulin be secreted?

Under which of the following circumstances will insulin be secreted?

A
The blood sugar level in the liver is low.
B
The blood sugar level in the hepatic portal vein is low.
C
The blood sugar level in the islets of Langerhans is high.
D
The glycogen level in the skeletal muscle is high.

Solution:

Insulin is secreted by the Islets of Langerhans in the pancreas when the blood sugar level is high. This increases the rate of glucose uptake from the blood into the muscle cells.