Question

Which of the following best explains why this is an example of a negative feedback loop?

A) when the levels drop below their set point, the pancreas brings it back to the set point
B) it is the process that puts sugar into our blood
C) it adds more and more sugar to our blood so that we can make ATP
D) when sugar levels drop below or rise above the set point, we have mechanisms in place to bring the sugar levels back to a set point.

Answer 1

Negative feedback loops bring a parameter back to its set point. In the case of blood glucose levels, when they drop below the set point, the pancreas releases insulin to decrease them.

Step-by-step explanation:

A negative feedback loop is when a homeostatic process changes the direction of the stimulus, either by increasing or decreasing it.

In the case of blood glucose levels, when the levels drop below their set point, the pancreas releases insulin, which causes blood glucose levels to decrease.

This is an example of a negative feedback loop because it brings the levels back to the set point.

So, option A) when the levels drop below their set point, the pancreas brings it back to the set point best explains why this is an example of a negative feedback loop.