Explain how and why GISs were developed and first used and how they are used today.

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.

c. establishing proper sleep hygiene

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it