It acts as an immediate source of energy for muscle contraction.
Correct answer: A. ATP
- A. ATP
- B. Phosphocreatine
- C. Fatty acids
- D. Glycogen
Explanation
ATP is the immediate source of energy for muscle contraction. Adenosine triphosphate (ATP) is a molecule found in cells that serves as a universal energy carrier. Its structure includes three phosphate groups. When a phosphate group is cleaved from ATP, energy is released. This energy is used to power various cellular processes, including muscle contraction. During muscle contraction, ATP is hydrolyzed to ADP (adenosine diphosphate) and inorganic phosphate (Pi). The energy released during this hydrolysis is utilized to fuel the interaction between actin and myosin, allowing muscle fibers to contract.
Last updated
About Support and Movement
Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.
Practise Support and Movement
738 free Support and Movement MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.