In congestive heart failure, what does ? congestive? refer to? a. a feeling of tightness or pressure in the chest b. fluid build-up in the heart and/or lungs c. narrowing of the coronary arteries due to plaque build-up d. an increase in heart rate due to the heart? s inefficiency e. a disease that develops quickly over time.

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.

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.