An organ is a structure made up of two or more tissues working together to perform a specific function. which of the following organs would contain the most nerve tissue according to its functional role in the body? a. heart b. brain c. lungs d. stomach

What happens as electrons move along the chain of molecules known as the electron transport chain? they gain energy, which causes atp molecules to lose phosphate groups. they gain energy, which causes h *ions to join with oxygen to produce water. they lose energy, which is then used by the cell to make atp. they lose energy, which is then used to break down atp.