An adult red deer (Cervus elaphus) has two kidneys. Together, these kidneys filter a total of 432 litres432\text{ litres}432 litres of blood plasma per day to produce glomerular filtrate.
How much fluid does one kidney filter per minute?
15 millilitres15\text{ millilitres}15 millilitres
150 millilitres150\text{ millilitres}150 millilitres
300 millilitres300\text{ millilitres}300 millilitres
9000 millilitres9000\text{ millilitres}9000 millilitres
22 exam-style questions on OCR GCSE Biology 3.3 Maintaining internal environments, covering 3.3.1 Importance of a constant internal environment, 3.3.2 The skin and body temperature, 3.3.3 Insulin and blood sugar, 3.3.4 Glucagon and blood sugar, 3.3.5 Type 1 and type 2 diabetes, 3.3.6 Osmotic changes in body fluids, 3.3.7 Kidneys and water balance, 3.3.8 Structure of the kidney and tubule, 3.3.9 ADH and kidney tubule permeability, and 3.3.10 Responses to temperature and osmotic challenges. Each one has a worked solution and a mark scheme showing where the marks go.