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- The excretory system consists of:A rectum, lungs, skin and kidneysB rectum, liver and kidneysC lungs, liver, skin and kidneysA person is suspected of having chronic renal failure. To assess kidneyfunction, urea clearance is measured and found to be very low. Explainwhat a very low urea clearance indicates for this patient. Compare that withthe effect of chronic renal failure on the tendency for the blood K+ level tobe higher than normal and the blood Na+ level to be lower than normal.Which of the following substances does the body normallyretain? Which does it normally excrete? (1) glucose, (2) sodiumions, (3) bicarbonate ions, (4) acids
- Describe the role of liver, lungs and skin in excretion.Define excretione The excretory system regulates the volume and composition of body fluids by removing wastes and returning useful substances to the body. Some of the characteristics of the excretory organs are given below. 1. Carries urine to the bladder 2. Stores urine 3. Eliminates urine from the body 4. Composed of nephrons Put the numbers of the above characteristics in order, so they correspond to the urinary bladder, the ureters, the kidneys, and the urethra. (Your answer should look like 1234, but that isn't the right order.) Answer: Next page OF
- Why is excretion important in order to achieve osmotic balance?The marine iguana(Amblyrhynchus cristatus), which spendslong periods underwater feeding on seaweed, relies on bothsalt glands and kidneys for homeostasisof its internal fluids.Describe how these organs together meet theparticular osmoregulatory challenges of thisanimal’s environment.While drinking many beers one night, Jason noticed that hehad to urinate more frequently. The following morning, Jason’smouth felt dry, and he had a headache. A friend told Jasonthat his symptoms were the result of dehydration. Based uponyour knowledge of the urinary system, how and why did Jasonbecome dehydrated? What hormone normally regulates theamount of water in the urine, and how did the alcohol interferewith this hormone’s function?