The kidneys Learn about how the kidney's maintain a constant internal environment. 3.0 / 5 based on 1 rating ? BiologyCells, tissues and organsGCSEAQA Created by: WanaCreated on: 19-04-13 18:16 What is the function of the kidneys? To control ion and water content 1 of 17 Describe the shape of kidneys They are bean-shaped and 11.5cm long 2 of 17 In the kidneys how types of molecule are filtered out of the blood? 4 3 of 17 Name these molecules. water,sodium,urea and glucose 4 of 17 What is reabsorbed into the blood by the kidneys? The amount of water,glucose and salt that's needed by the body 5 of 17 Name two more things that the kidneys control? The level of salts in the blood and the excretion of urea and other waste products 6 of 17 What concentration is urine when there's a high level of water in the blood plasma? low concentration-a pale yellow 7 of 17 What concentration is urine when the water levels in the blood plasma are too low? High concentration-yellow 8 of 17 Name these variables. External temparature,amount of exersise,fluid intake and salt intake 9 of 17 What two drugs affect water balance? alcohol and ecstasy 10 of 17 How do they affect water balance? alcohol causes the kidneys to produce a greater volume of more dilute urine and ecstasy causes the kidneys to produce a small volume of less urine 11 of 17 What hormone controls the concentration of our urine? ADH 12 of 17 What two things does the pituatry gland do? to aid the kidneys' work... Monitors the concentration of blood plasma,releases ADH into the blood stream which travels towards the kidneys 13 of 17 What feature in the brain detects water concentration? The Hypothamalus 14 of 17 Where to does water travel from the kidneys? To the bladder 15 of 17 How does alcohol affect ADH? Alcohol suppresses ADH production 16 of 17 How does ecstasy affect ADH production? Increases ADH production 17 of 17
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