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Homeostasis and Coordination
Quick questions on Homeostasis and blood glucose: N(A)-Level Biology Homeostasis and Coordination
6short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is controlling blood glucose?Show answer
Glucose is the sugar that cells use for respiration, so the body keeps its level in the blood fairly steady. The organ in charge is the pancreas, and the main hormone is insulin.
What is negative feedback?Show answer
This is an example of negative feedback: when the level rises too high, the body acts to bring it back down; when it falls too low, the body acts to raise it. Each change triggers a response that reverses it, which keeps the level steady around a set point. (When glucose falls too low, the pancreas releases less insulin and the stored glucose can be released again.)
What are diabetes?Show answer
In diabetes, the body cannot control blood glucose properly, often because the pancreas does not make enough insulin. Without enough insulin, the blood glucose can rise dangerously high. People with diabetes may need to control their diet, exercise, or have insulin to keep their glucose steady. This shows how important the normal control system is.
What is q1?Show answer
Define homeostasis. [2 marks]
What is q2?Show answer
Name the hormone that lowers blood glucose and the organ that releases it. [2 marks]
What is q3?Show answer
Explain why keeping a steady internal environment matters for the body's cells. [2 marks]
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