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Q.
Which is not true in muscle contraction?
Locomotion and Movement
Solution:
Muscle cells have a contractile mechanism which is a tated by the action potential. The action potential is transmitted along the muscle fibre and initiates the contractile response. The contractile proteins are actin and myosin. Actin and myosin get combined in presence of ATP and Ca2+to form actomyosin to provide contraction in muscle. Muscle contraction require energy, and muscle has been called a ‘machine for converting chemical energy into mechanical work’.Theimmediate source of this energy is energy rich organic phosphate derivatives in muscle i.e.,ATP. In musclethere also exists another energy rich phosphate compound that can supply this energy for short periods. This compound is phosphocreatine which is hydrolysed to creatine and phosphate groups with release of considerable energy