Which description correctly identifies the effect of a decrease in the secretion of antidiuretic hormone (ADH) on the collecting duct of the kidney tubule and the resulting urine?
Permeability to water increases, resulting in a more concentrated urine.
Permeability to water increases, resulting in a more dilute urine.
Permeability to water decreases, resulting in a more concentrated urine.
Permeability to water decreases, resulting in a more dilute urine.
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.