This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal Muscle: Contraction and Excitation, Subject name: Physiology
Role of creatine phosphate in muscle - 
Select and explain. 
A. Helps in gluconeogenesis, B. Provides instant energy', C. Involved in action-contraction coupling, D. Helps in stretch reflex
B: Provides instant energy'
Answer: B: Provides instant energy' 
Explanation: Ans. is 'b' i.e., Provides instant energy o In muscles, creatine phosphate occurs as a reservoir of high-energy phosphate groups,o It provides a quick source of energy for muscle fibres to contract when they need an initial burst of energy,o Creatine phosphate helps generation of ATP in exercising muscles bv substrate level phosporvlation.