Describe the process of active transport?

Answer 1

Active transport is when a protein moves a certain material across the membrane from a region of lower concentration to a region of higher concentration. This means the substance is absorbed against the concentration gradient and energy is needed for this active transport to work. The energy is usually comes from adenosine triphosphate or ATP, every cell supplies its own ATP by cell respiration. Globular proteins or pump proteins or transporter proteins in membranes carry out the active transport, the membrane must contain a lot of these proteins so that the cell can control the contents of its cytoplasm precisely. An example of active transport is in human nerve cells where potassium ions are pumped in and sodium ions are constantly transported out of the cell by active transport into the external fluid bathing the cell to build up a store of potential energy or an electrical impulse that is used to transmit a nerve impulse.

Answer 2

Active transport is described as the movement of substances against their concentration gradient. This is movement of molecules from low concentration to high concentration
Active transport is the process of moving molecules from a low concentration to a high concentration across a cell membrane.

Answer 3

Active transport involves the use of proteins that don't just passively facilitate the transport of substances across the cell membrane, but require the use of cellular energy (usually ATP) to actively pump substances into or out of the cell.

An example of this is the sodium-potassium pump found in the cell membrane of neurons. This protein pumps sodium ions from the inside to the outside of the neuron and pumps potassium ions in the opposite direction. The cell must use ATP for this process.

Answer 4

Movement of a substance that utilizes a carrier; energy comes directly from hydrolysis of ATP.

Answer 5

A solute will travel up its concentration gradient from low to high concentration, this is why it needs energy from ATP.