ATPase function - membrane transport, contractile proteins and synthesis

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• Energy from ATP is used to move ions across the cell membrane during active transport. • This membrane protein transports sodium out of the cell and potassium into the cell. As such, it is called a sodium-potassium pump. • Because this pump also acts as an enzyme to hydrolyze ATP it is also called ATPase. • Contraction of muscle also uses the energy in ATP. • The proteins in the muscle use the energy to pull past one another. • This makes the muscle shorten. • Myosin is the protein that splits ATP, as well as pulling the other proteins. • Its name is myosin ATPase. • Synthesis of molecules is another example of the use of energy from ATP. • This high-energy bond is formed during cellular respiration. Enzymes are proteins that catalyze reactions. ATPases are enzymes that use the energy from the breakdown of KIP molecules. The energy from ATP is used for many important physiological processes including: • active transport • movement • synthesis

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