What are the characteristics of the central nervous system? select all that apply.

1: it is made up of the brain and spinal cord.

2: it is a system of bones that supports the body.

3: it uses the spinal cord as a pathway to transmit messages to the pns.

4: it contains networks of nerves called plexuses.

(i rate 5star if right)

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.