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Home › AQA GCSE Biology › Maintaining water and nitrogen balance in the body (homeostasis principles)
AQA · GCSE · Biology

Maintaining water and nitrogen balance in the body (homeostasis principles)
Practice Questions

40 AQA GCSE Biology questions on Maintaining water and nitrogen balance in the body (homeostasis principles), each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Maintaining water and nitrogen balance in the body (homeostasis principles)

Question 1 · 1 mark · Difficulty 1/3

What are the three components of any homeostatic control system?

  1. Nerves, hormones and enzymes
  2. Receptors, a coordination centre and effectors
  3. The brain, the liver and the kidneys
  4. Stimulus, response and feedback
Show answer & explanation
✓ Answer: B — Receptors, a coordination centre and effectors
Receptors detect the change, the coordination centre processes it, and effectors carry out the response.
Question 2 · 1 mark · Difficulty 1/3

What does a receptor do in a control system?

  1. Processes the information and decides what to do
  2. Carries out the response
  3. Detects a change in the internal or external environment
  4. Stores the body's water reserves
Show answer & explanation
✓ Answer: C — Detects a change in the internal or external environment
Without detection, no correction can be triggered.
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20 questions · 25 min · free

AQA GCSE Biology: Maintaining water and nitrogen balance in the body (homeostasis principles) FAQ

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Are the Maintaining water and nitrogen balance in the body (homeostasis principles) questions aligned to the official AQA GCSE Biology syllabus?
Every question is written against the published AQA GCSE Biology specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real AQA paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from AQA.
How is Maintaining water and nitrogen balance in the body (homeostasis principles) typically tested on AQA GCSE Biology papers?
Maintaining water and nitrogen balance in the body (homeostasis principles) appears across multiple question types on real AQA GCSE Biology papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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