Which organisms release carbon dioxide during cellular respiration? O only producers
O only consumers
O both producers and consumers

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.