Fatigue and Exercise Quiz

Which molecule is the primary energy source during high-intensity, short-duration exercise?

• ATP

• Creatine

• Glycogen

• Lactate

What is the end product of anaerobic glycolysis in muscle cells?

• Pyruvate

• Acetyl-CoA

• Lactate

• ATP

Which ion accumulates in the muscle during fatigue and interferes with contraction?

• Na⁺

• K⁺

• H⁺

• Mg²⁺

What is the term for the inability to maintain a desired level of force or power output?

• Overtraining

• Fatigue

• DOMS

• Cramping

Which of the following is a major contributor to peripheral fatigue?

• Mental stress

• Dehydration

• Neuromuscular inhibition

• Metabolite accumulation

What is the normal pH range of resting muscle tissue?

• 5.5-6.0

• 6.8-7.1

• 7.4-7.8

• 8.0-8.4

Which substrate is primarily used during prolonged, low-intensity exercise?

• Phosphocreatine

• Muscle glycogen

• Blood glucose

• Fatty acids

Which vitamin plays a key role in oxidative phosphorylation?

• Vitamin B6

• Vitamin C

• Vitamin B3 (niacin)

• Vitamin E

What is the role of carnosine in muscle tissue?

• Energy buffer

• pH buffer

• ATP producer

• Oxygen transporter

Which organ is primarily responsible for converting lactate back into glucose?

• Kidney

• Liver

• Muscle

• Pancreas