(b) The response of the skin to cold weather is an involuntary action. Explain how an involuntary action differs from a voluntary action.

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.

Carbon monoxide is the answer: )

3. is true i think i should be right