We know that the overall purpose for mitosis is cell growth and repair. Cell that regularly undergo mitosis are skin and hair cells, while cells of the brain and spinal cord do not. Name two other organs in the body cells would not regularly undergo mitosis pls answer ​

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.