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Test

Excretion

eleanorbooty 10 preguntas 1,0 (1 valoración)

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Preguntas del test (10)

  1. 1Name the parts of the nephron.
    1. ARenal Pelvis
    2. BCortex
    3. CArterioles (afferent/efferent)
    4. DCollecting duct
  2. 2In what process is blood plasma filtered from the nephron (glomerulus) and flows into the proximal convoluted tube.
    1. AReabsorption
    2. BFiltration
    3. CSecretion
    4. DExcretion
  3. 3What is the process of reabsorption?
    1. AMost of the viscuous glomerular filtrate is returned to the blood vessels surrounding the convoluted tubules.
    2. BThe remaining fluid becomes urine, which travels down the collecting duct to the medullary region of the kidney.
    3. CThe urine (in mammals) is stored in the urinary bladder.
  4. 4Why are proteins converted to ammonia?
    1. ABecause proteins contain a lot of energy and it would be wasteful to excrete them so they are broken down to release energy.
    2. BBecause proteins are more toxic than ammonia.
  5. 5Why must proteins not be stored in high quantities?
    1. AThe amine group is toxic.
    2. BThe nitrogen group is toxic.
    3. CThe R group is toxic.
  6. 6Describe the process of deamination.
    1. AAmino acid + Oxygen > Keto acid + ammonia
    2. BAmino acid > Keto acid + ammonia
    3. CAmino acid > Ammonia
    4. DAmmonia > Urea
  7. 7What happens to keto acid after the process of deamination?
    1. AGoes to be used in respiration directly.
    2. BGoes to be used in protein synthesis.
    3. CGoes to be used in the ornithine cycle.
  8. 8Why must Ammonia be converted to Urea?
    1. AAmmonia must not be allowed to accumulate due to its toxicity. And urea is less toxic than ammonia.
    2. BAmmonia must be broken to release energy for respiration.
  9. 9Describe the ornithine cycle.
    1. AAmmonia is combined with CO2 to produce urea. Urea is passed back into the blood and transported to the kidneys. The kidneys filter the urea from the blood and stores it in the kidney.
    2. BAmmonia is combined with CO2 to produce keto acid. Keto acid is transported to the kidneys via the blood. Kidneys filter the keto acid form the blood and is stored in the bladder.
    3. CAmmonia is combined with CO2 to produce urea. Urea is passed back into the blood and transported to the liver. The liver filters the urea from the blood and stores it in the liver.
  10. 10Approximately how much protein do we need a day?
    1. A40 - 60 g
    2. B50 - 70 g
    3. C100 - 150 g
    4. D20 - 30 g
    5. E50 - 100 g

Información

Descripción
Test sobre Excretion, creado por eleanorbooty el 20/11/2014.
Idioma
English
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