---
title: "Blood Glucose Control and Diabetes"
description: "Insulin and glucagon push blood glucose back towards its set point after a meal or a long gap without one. Type 1 and type 2 diabetes break the loop at different places, which is why the treatments di"
canonical: https://lightmysky.com/learn/science/blood-glucose-control-and-diabetes-mt_eOzNtiBvX2
source: https://lightmysky.com/learn/science/blood-glucose-control-and-diabetes-mt_eOzNtiBvX2.md
retrieved: 2026-11-12
---

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# Blood Glucose Control and Diabetes

Insulin and glucagon push blood glucose back towards its set point after a meal or a long gap without one. Type 1 and type 2 diabetes break the loop at different places, which is why the treatments differ.

Subject: Science · Area: The Human Body · Ages 14 to 16
Page: https://lightmysky.com/learn/science/blood-glucose-control-and-diabetes-mt_eOzNtiBvX2

## Ready when they can

- Says what the pancreas releases when glucose is high and when it is low, and what the liver does in each case.
- Tells type 1 from type 2 by which part of the loop has failed.
- Reads a glucose against time graph and marks where insulin was acting.

## Lesson: Keeping sugar steady

After a meal blood glucose climbs above its set point. The pancreas releases insulin. That release is the high-side answer.

Insulin tells the liver to store glucose as glycogen. Between meals glucose falls, the pancreas releases glucagon, and the liver releases stored glucose back.

*(drawing: In our story graph the fall follows the peak and the rise follows the dip. A real trace alone cannot prove which hormone acted.)*

In type 1 the pancreas makes little or no insulin. With almost no signal after meals, glucose stays high. The loop breaks at supply.

In type 2 cells answer insulin poorly and supply can also fall short of need. Food and activity affect glucose, and medicines vary from person to person and can include insulin. Care differs because bodies differ.

A missing supply and a poor response look different on paper. Trace A with almost no signal matches missing supply. Trace B with plenty of signal but high glucose matches poor response. One graph alone never proves the cause. Lab measures check it.

**Tip.** Always name both the signal and the responder. Say what the pancreas releases when glucose is high and when it is low, then say what the liver does in each case.

**Recap.** Insulin banks glucose after meals, glucagon withdraws it between them, and each diabetes type breaks a different link.

## Practice

8 questions on this page, each with its working shown.

## Needs first

- [Hormones and Negative Feedback](https://lightmysky.com/learn/science/hormones-and-negative-feedback-mt_OBa6BHmW29)

## Optional connections

- [Body Temperature Regulation](https://lightmysky.com/learn/science/body-temperature-regulation-mt_zaXr5wcJD2)

## Opens up

- [Hormones in the Menstrual Cycle and Fertility](https://lightmysky.com/learn/science/hormones-in-the-menstrual-cycle-and-fertility-mt_DENo5Fbr1d)
- [Ultrafiltration and Selective Reabsorption in the Nephron](https://lightmysky.com/learn/science/ultrafiltration-and-selective-reabsorption-in-the-nephron-mt_vSKfoJN6zh)
- [Fuel Homeostasis and the Fed to Fasted Switch](https://lightmysky.com/learn/science/fuel-homeostasis-and-the-fed-to-fasted-switch-mt_zZrXwbWqw-)