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Temperature and water balance

6 lessons in Homeostasis and response.

37 exam questions · 101 marks

5.14 Controlling body temperature How the thermoregulatory centre in the brain and the skin keep body temperature near 37 °C, using sweating, vasodilation, vasoconstriction and shivering. Separate only AQA Edexcel OCR 5.15 Water, urea and osmosis in the body How water, ions and urea leave the body, why cells are damaged if body fluids become too dilute or too concentrated, and how the liver turns excess amino acids into urea. Separate only AQA Edexcel OCR 5.16 How the kidneys make urine The urinary system, and how the kidneys make urine by filtering the blood and selectively reabsorbing glucose, some ions and water, with data on what is in plasma, filtrate and urine. Separate only AQA Edexcel OCR 5.17 The nephron The structure of a nephron (glomerulus, Bowman's capsule, convoluted tubules, loop of Henle, collecting duct) and how each part filters the blood or reabsorbs glucose and water. Separate only Edexcel OCR 5.18 ADH and water balance How ADH from the pituitary gland changes how permeable the kidney tubules are to water, controlling the water content of the blood by negative feedback, and how the body copes with dehydration, excess water and salt. Higher only Separate only AQA Edexcel OCR 5.19 Kidney failure: dialysis and transplants What happens when kidneys fail, how a dialysis machine cleans the blood, how kidney transplants work, and how to compare the two treatments. Separate only AQA Edexcel