Excretion 0.0 / 5 ? BiologyGCSEAQA Created by: Bonnie DohertyCreated on: 30-04-13 12:40 1:Why do toxic substances have to be removed? Because they can cause damage to cells 1 of 13 2: How is carbon dioxide excreted? Excreted by the lungs and through exhaled air 2 of 13 3: How is urea excreted? Excreted by the kidneys and through urine 3 of 13 4: How are mineral salts excreted? Excreted by the skin and kidneys and through sweat and urine 4 of 13 5: How is water excreted? Excreted by the skin, kidneys and through sweat and urine 5 of 13 6: Where is urea produced? In the liver 6 of 13 7: Describe the process of urea being produced? It is carried to the kidneys where it is filtered from the blood, the kidneys produce urine and pass it to the bladder for storage 7 of 13 8: What is the urether? A tube wich allows urine to pass from the kidneys to the bladder 8 of 13 9: What does the renal artery do? Brings blood to the kidneys 9 of 13 10: What does the renal vein do? Carries blood away from the kidneys 10 of 13 11: What can happenif kidneys fail to work? Toxins and large amounts of water build up which can be fatal 11 of 13 12: What do dialysis machines do? Mimic the role of the kidneys and seperates toxins away from useful substances 12 of 13 13: Name a disadvantage of dialysis machines The patient must be connected at least 3 times a week usually in a hospital, can be very time consuming 13 of 13
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