Protein contains nitrogen as part of its chemical structure. When the carbon skeletons of amino acids are metabolized to produce glucose or fat, ammonia is the resulting nitrogen-containing waste product. What happens to ammonia?
Multiple Choice
a. Ammonia is converted to urea and excreted in the urine.
b. Ammonia is used to clean out the liver.
c. Ammonia is repackaged into other amino acids that are used by the body.
d. Ammonia is broken down into carbon and oxygen that contribute to respiration.