Four-year-old karen can't remember anything of the first few months of her life. this is best explained by the fact that the trauma of birth interferes with the early formation of memories. most brain cells do not yet exist at the time of birth. experiences shortly after birth are a meaningless blur of darkness and light. the hippocampus and frontal lobes are immature during early infancy.

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.