4) "In the presence of nature, a wild delight runs through the man in spite of
great sorrows."*

a chair, a bed, and a toothbrush

explanation:

i was told this before by a teacher, so yeah

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.