The sodium ion is at the highest concentration in:
intracellular fluid
extracellular fluid
blood plasma
none of the above

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.

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the

What is the number of cells produced in mitosis