Here's an example of what's due today

Negative feedback model build

Tue, Apr 6, 2027 · Week 12 · Human Anatomy & Physiology (Human Body Systems)

Today's goal: Students will build and run a physical model of blood-glucose negative feedback involving insulin and glucagon.

Learn first

What a finished product looks like

This is a model of the work you should turn in today. Use it to check your own: match the structure and the level of detail, do not copy it. Your data and wording should be your own.

Blood-glucose feedback loop diagram

Completes: A feedback-loop diagram showing the insulin response to a meal and the glucagon response to fasting, with labeled negative-feedback arrows showing return toward the set point.

Negative feedback loop for blood glucose (set point about 90 mg/dL):

Meal scenario (glucose rises):

Blood glucose goes up.
Pancreas releases insulin.
Insulin moves glucose into cells, so blood glucose falls back toward the set point.

Fasting scenario (glucose falls):

Blood glucose goes down.
Pancreas releases glucagon.
Glucagon releases stored glucose from the liver, so blood glucose rises back toward the set point.

Why this is negative feedback: each response opposes the change that triggered it (high glucose triggers lowering, low glucose triggers raising), pulling the variable back to the set point.

Diagram of blood glucose around a set point: after a meal glucose rises and insulin lowers it back; during fasting glucose falls and glucagon raises it back.

Also due today: Submit your loop diagram to the Schoology assignment for HBS Endocrine Day 3.

Check yourself

WebXam problem for today's skill

One exam-style question that uses exactly what you practiced today. Try it before you reveal the answer, then read why each choice is right or wrong.

WebXam-style domain: Human Body Form, Function, and PathophysiologySelf-check skill: Tracing insulin and glucagon in blood-glucose negative feedback

Right after a large meal, blood glucose rises sharply. In a healthy person, which hormone is released, and what does it do?

Tap an answer to see the full explanation. Nothing is recorded or graded.

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