How does the human body return carbon to the atmosphere in the carbon cycle?

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

the answer is

passive transport is a movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

so, according to what that says, i believe it's hypertonic and hypotonic.

good luck!