Cambridge Technical Level 3 - Sport - The Neuromuscular System

What does aerobic exercise involve?

• High intensity workouts only

• Short duration workouts

• Performing in the presence of oxygen

• Performing in the absence of oxygen

Which type of muscle fibers are evolved during anaerobic exercise?

• Slow twitch muscle fibers

• Fast oxidative glycolic fibers

• Slow oxidative muscle fibers

• Fast twitch muscle fibers

What is the main characteristic of slow oxidative muscle fibers?

• Produces a maximum force over a short period

• Fatigues easily

• Produces a small amount of force over a long period

• Rich in phosphocreatine

What is the role of mitochondria in muscle cells?

• Responsible for anaerobic energy production

• Responsible for transporting oxygen

• Responsible for aerobic energy production

• Stores high energy compounds

Which type of exercise is suited to type 1 slow twitch fibers?

• 100 meter sprint

• High intensity short duration exercise

• Marathon running

• Power lifting

What is the function of myoglobin in muscle tissue?

• Stores phosphocreatine

• Responsible for aerobic energy production

• Produces maximum force

• Transports oxygen to the mitochondria

Which muscle fiber type is known for having a high concentration of mitochondria, myoglobin, and capillaries?

• Fast oxidative glycolic fibers

• Type 2B fibers

• Slow oxidative muscle fibers

• Fast glycolytic fibers

What triggers the contraction of muscle fibers in a motor unit?

• The all or none law

• Spatial simulation

• Wave summation

• A minimum amount of stimulation called the threshold

What is the primary energy source for fast glycolytic fibers?

• Oxygen

• Anaerobic respiration

• Phosphocreatine

• Mitochondria

How does the body increase the strength of muscle contraction?

• By altering the number and size of muscle motor units

• By reducing the intensity of the nerve impulse

• Through the all or none law

• By decreasing the number of motor units activated