Which of these occurs during active transport? which of these occurs during active transport? water moves across the plasma membrane. proteins powered by atp move substances up a concentration gradient. membrane-bound vesicles release substances into or out of the cell. substances move spontaneously down a concentration gradient?

During active transport proteins powered by ATP move substances up a concentration gradient. During active transport, a protein pump uses energy, in the form of ATP, to move molecules from an area of low concentration to an area of high concentration. An example of active transport is the sodium-potassium pump, which moves sodium ions to the outside of the cell and potassium ions to the inside of the cell.