As food molecules are broken down during carbon is released back into the atmosphere as carbon dioxide. a. breathing b. the nitrogen cycle c. the water cycle d. cellular respiration

The location of the stomach is the diaprham

The third stage of cellular respiration is (2 points)

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.