The pancreas secretes insulin in response to
High blood glucose level
The correct option is D:
Explanation of the correct option :
High blood sugar stimulates clusters of special cells, called beta cells, in your pancreas to release insulin. The more glucose you have in your blood, the more insulin your pancreas releases.
Explanation of the incorrect option:
Option A:
An increase in body activity does not stimulate the secretion of insulin from the pancreas.
Option B:
No hormone is released from the pituitary which stimulates the secretion of insulin from the pancreas.
Option C:
Low blood glucose inhibits the production of insulin.
Final answer: High blood glucose levels stimulate the pancreas to secrete insulin.