ATP PC System

What is the primary function of ATP in muscle contractions?

• To remove waste products from muscles
• To provide energy for muscle contraction
• To transport nutrients to muscles
• To store oxygen for later use

How long can the ATP PC system provide energy for maximal effort?

• Up to 20 seconds
• Up to 5 seconds
• Up to 10 seconds
• Up to 15 seconds

What substance is broken down to regenerate ATP in the ATP PC system?

• Glucose
• Creatine phosphate
• Lactic acid
• Fatty acids

Which type of exercise predominantly uses the ATP PC system?

• Long-distance running
• Maximal sprinting
• Marathon running
• Walking

What is the role of phosphocreatine in the ATP PC system?

• To provide oxygen for respiration
• To store fat for energy
• To release energy to resynthesize ATP
• To transport ATP to muscles

What is a key characteristic of the ATP PC system?

• It requires oxygen to function
• It operates anaerobically
• It is used during low-intensity activities
• It lasts for hours

What happens to phosphocreatine levels after maximal exercise?

• They increase significantly
• They deplete and take time to recover
• They remain constant
• They convert to lactic acid

Why might athletes take creatine supplements?

• To increase aerobic capacity
• To enhance recovery and performance in short bursts
• To improve flexibility
• To aid in fat loss

What is the primary energy source used to regenerate ATP in the ATP PC system?

• Adenosine triphosphate (ATP)
• Phosphocreatine (PC)
• Glucose
• Lactic acid