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.

answer: oof wait

explanation:

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.