functions of the kidney

• what are the two main functions of the kidneys

  nitrogenous excretion and osmoregulation
• what is meant by nitrogenous excretion


  this is the removal of nitrogenous metabolic waste from the body
• can amino acid be stored in surplus


  no
• what happens to the excess amino acids in the body


  they are deanimated int he mammalian liver
• what substances are deanimated in the mammalian liver


  proteins and nitrogenous compounds
• what are the two primary substances excreted from the body

  urea and carbon dioxide
• what is the first step of deanimation in the liver


  an amine group is removed form excess amino acids
• what happens in deanimation after a amine group is removed from the excess amino acids


  the removed amine group is converted into ammonia
• what happens in deanimation after the amine group has been converted into ammonia


  with the addition of co2 urea is formed and transported in the blood to kidneys
• what is more toxic ammonia or urea


  ammonia
• what is the final step of deanimation


  urea is removed from the blood at the kidneys and excreted in the urine
• what is meant by osomregulation


  this is the control of the water and solute composition of body fluids
• give example of solutes in bodily fluids


  blood tissue fluid and lymph
• what is meant by excretion


  this is the elimination of waste products
• how do humans gain water

  food ,drink and respiration
• how do humans lose water

  sweating, exhaling urination and egestion of faeces