Question

The immediate regeneration of ATP used up during muscle contraction is facilitated by

• A. Glucose.
• B. Glycogen.
• C. Lactic acid.
• D. Creatine phosphate.

Answer 1

The correct option is D Creatine phosphate.

Creatine is produced by the liver, kidney, and pancreas. Creatine is naturally found in your muscles. Creatine phosphate or phosphocreatine is a phosphorylated creatine molecule that serves as a rapid release reserve of high-energy. An energy-rich muscle has lots of creatine phosphate, whereas a fatigued muscle has little creatine phosphate. All muscle cells have some ATP within them for immediate use. The muscles’ limited ATP supply is used very quickly in muscle activity, so the need to regenerate ATP is essential. Creatine phosphate helps in the regeneration process. In the process of regeneration of ATP, creatine phosphate transfers a high-energy phosphate to ADP. The products of this reaction are ATP and creatine.