What happens during protein catabolism? How is this related to nitrogen balance?
Protein catabolism is the breakdown of proteins by cellular proteases and peptidases into constituent amino acids. These amino acids can be either reused for protein synthesis (anabolism) or broken down via deamination and used to make glucose or directly used in the citric acid cycle to make ATP. Deamination removes the nitrogen group from the amino acid, which is then excreted as urea. This results in a negative nitrogen balance.
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Fill in the blank(s) with the appropriate word(s).
What is the shape of the pineal gland?
a. apple b. pinecone c. diamond d. cross e. kidney bean
Why must PO2 be decreased substantially before ventilation increases, but even small increases in PCO2 stimulate ventilation?
What will be an ideal response?
Minerals:
a. are organic substances b. are inorganic substances c. attach to enzymes to help them work d. both B and C above