Lesson 4.5.3.3

4.5.3.3 Maintaining water and nitrogen balance in the body (biology only) Quiz: AQA Biology, Unit 5

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

In partnership with Revision Ninja

Lesson 4.5.3.3, Maintaining water and nitrogen balance in the body (biology only): 20 multiple choice questions for the AQA GCSE Biology (8461), Unit 5: Homeostasis and response, written with Revision Ninja.

Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.

Host this setFree Play

The 20 questions

  1. Through which route does water leave the body during exhalation?

    • The tears only
    • The hair follicles
    • The lungs
    • The ear canal

  2. Which three substances are lost from the body in sweat?

    • Water, glucose, urea
    • Water, proteins, ions
    • Glucose, ions, urea
    • Water, ions, urea

  3. How much physiological control does the body have over water lost through the lungs?

    • Neural control
    • Hormonal control
    • Complete control
    • No control

  4. Which organs remove excess water, ions and urea in urine?

    • The kidneys
    • The thyroid
    • The ovaries
    • The pancreas

  5. What happens to body cells if they gain or lose too much water by osmosis?

    • Produce extra urea
    • Function inefficiently
    • Stop respiring completely
    • Divide rapidly

  6. Which two main processes do the kidneys use to produce urine?

    • Deamination and filtration
    • Filtration and reabsorption
    • Digestion and absorption
    • Diffusion and transport

  7. Which sugar is completely reabsorbed back into the blood by healthy kidneys?

    • Starch
    • Sucrose
    • Glycogen
    • Glucose

  8. (HT only) Where is ammonia converted into urea?

    • The brain
    • The heart
    • The kidney
    • The liver

  9. (HT only) What does deamination of excess amino acids form?

    • Ammonia
    • Starch
    • Urea directly
    • Glucose

  10. (HT only) Which hormone controls water reabsorption in the kidney tubules?

    • Glucagon
    • Testosterone
    • ADH
    • Insulin

  11. Which gland releases antidiuretic hormone into the bloodstream?

    • Adrenal gland
    • Thyroid gland
    • Pancreas
    • Pituitary gland

  12. What condition triggers an increased release of ADH into the blood?

    • Low blood concentration
    • High blood concentration
    • High blood pressure
    • Low blood glucose

  13. How does ADH affect the permeability of kidney tubules to water?

    • Prevents permeability
    • Decreases permeability
    • Has no effect
    • Increases permeability

  14. (HT only) What type of control does ADH water regulation use?

    • Negative feedback
    • Positive feedback
    • Random control
    • No feedback

  15. Which two treatments are used for severe kidney failure?

    • Chemotherapy and transplant
    • Radiotherapy and dialysis
    • Insulin and dialysis
    • Dialysis and transplant

  16. Which transport process removes waste from blood during kidney dialysis?

    • Active transport
    • Diffusion
    • Osmosis
    • Respiration

  17. In liver cells, excess amino acids are broken down into which toxic chemical?

    • Urea
    • Uric acid
    • Lactic acid
    • Ammonia

  18. Where in the human body are excess amino acids converted into urea?

    • Pancreas
    • Liver
    • Stomach
    • Kidneys

  19. Which three substances are lost from the skin in sweat?

    • Glucose, ions, urea
    • Water, lipids, glucose
    • Water, protein, glucose
    • Water, ions, urea

  20. In the liver, deamination of excess amino acids produces which toxic substance?

    • Uric acid
    • Ammonia
    • Lactic acid
    • Urea

All AQA Biology quizzes