The plasma membrane serves many functions, many of which depend on the presence of specialized membrane proteins. which of the following roles of the plasma membrane could still occur if the bilayer were lacking these proteins?

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added