When blood glucose levels increase, a hormone called insulin is released from endocrine cells in the pancreas. The role of insulin is to return blood glucose levels to normal. Which part of this negative feedback loop is the stimulus?
A) increasing blood glucose levels
B) blood glucose levels return to normal
C) insulin
D) pancreas

Question

Quizplus · Accepted Answer

The stimulus in a negative feedback loop is the initial change that triggers the response. In this case, the increasing blood glucose levels are the stimulus that prompts the release of insulin to lower the glucose levels back to normal.

When Blood Glucose Levels Increase, a Hormone Called Insulin Is