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Eric McClean
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Hi
Can anyone throw some light on active transport? need urgent help.
Thanks in advance
Can anyone throw some light on active transport? need urgent help.
Thanks in advance
Eric McClean said:Hi
Can anyone throw some light on active transport? need urgent help.
Thanks in advance
Active transport is a biological process in which cells use energy to transport molecules against their concentration gradient, from an area of lower concentration to an area of higher concentration.
The main difference between active transport and passive transport is that active transport requires energy in the form of ATP, while passive transport does not. Passive transport allows molecules to move with their concentration gradient, while active transport moves them against their concentration gradient.
The two main types of active transport are primary active transport and secondary active transport. Primary active transport uses ATP directly to move molecules, while secondary active transport uses the energy stored in concentration gradients of other molecules to move molecules against their gradient.
Some examples of active transport include the sodium-potassium pump, which is used to maintain the balance of ions in nerve cells, and the proton pump, which is used in the digestive system to transport hydrogen ions into the stomach. Other examples include endocytosis and exocytosis, which are used to transport large molecules and particles into and out of cells.
Active transport is important for cells because it allows them to maintain concentration gradients and control what substances enter and leave the cell. This is crucial for many cellular processes, such as nutrient uptake, waste removal, and cell signaling. Without active transport, cells would not be able to function properly and maintain homeostasis.