Which statement(s) corresponds to cellular respiration? choose all that apply.

1.co2 diffuses passively into the cell
2.co2 diffuses passively out of the cell
3.co2 must be pumped out of the cell
4.o2 diffuses passively when produced inside the cell
5.o2 diffuses passively and then is converted to co2
6.o2 is pumped in and forces co2 out