Biology Paper 2
Kidney and water balance [Triple Only]
Homeostasis and Response training before the targeted original question drill.
Adaptive teaching card
Make it concrete
Analogy
Kidney and water balance [Triple Only] is like a living system solving a small survival problem: each part has a job, and the answer depends on how those jobs connect.
Why now: An analogy helps when the definition feels abstract.
Do this: Match each part of the analogy to the science idea.
Learn it
Kidneys remove urea and control water and ion balance.
ADH changes how much water is reabsorbed by kidney tubules.
Kidney failure can be treated with dialysis or transplant.