Muscle Fatigue Quiz

What is the neurotransmitter released by the motor neuron?

• GABA

• Serotonin

• Acetylcholine

• Dopamine

What is the crucial step for muscle contraction?

• Action potential

• Production of waste products

• Release of lactic acid

• Generation of ATP

What is the energy source used to power the muscle contraction?

• Glucose

• ATP

• Glycogen

• Creatine

What causes the muscle to contract by enabling proteins to lock together?

• Release of calcium

• Depletion of ATP

• Build-up of lactic acid

• Increase in pH

What happens to the ions like sodium, potassium, and calcium during repeated contractions?

• They remain constant in the muscle cell

• They are generated in the muscle cell

• They are depleted in the muscle cell

• They are cleared from the muscle cell

What happens to muscle fatigue as physical fitness improves?

• It becomes unpredictable

• It remains the same

• It decreases

• It increases

What helps in replenishing ions throughout the muscle after a period of rest?

• Increase in pH

• Depletion of ATP

• Release of lactic acid

• Active sodium and potassium pumps

Why do larger muscles have a higher capacity to push fatigue farther into the future?

• They have smaller stores of ATP

• They have smaller stores of waste products

• They have bigger stores of ATP

• They have bigger stores of waste products