Primary and secondary active transport refer to the movement of molecules and cell components within cells and throughout the body. Primary and secondary active transport require energy to work and are both important for... More »

Active transport requires energy because it is pumping particles, such as proteins, ions and sugar molecules, against a concentration gradient: from areas of lower to higher solute concentration. The main energy source f... More »

The major difference between active and passive transport is that passive transport does not require the application of external energy, while active transport does. Both processes move molecules across the cell membrane... More »

According to cell biology, molecular transport involves the movement of molecules into and out of cells across a cell membrane. Two different types of molecular transport exist: active transport and passive transport. More »

The four roles of proteins are to help provide structure, transport other molecules around the body, facilitate essential biochemical reactions in the body and act as channels for the passage of important molecules to an... More »

Active transport is a method cells use to move individual molecules from areas of lower concentration to areas of higher concentration. This transport is generally from inside the cell to outside the cell or vice versa. ... More »

Active transport is different from passive transport in that during active transport, molecules move against the concentration gradient, which means they move from a low-concentration area to a high-concentration area. O... More » Science Biology