Muscle Function and Fiber Types Quiz

What is the primary function of antagonistic muscles?

• To push and pull

• To contract and relax in pairs

• To only push

• To only relax

Which muscle contracts to bend the arm?

• Triceps

• Quadriceps

• Biceps

• Hamstrings

What type of respiration do slow-twitch fibers primarily use?

• Anaerobic respiration

• Aerobic respiration

• Photosynthesis

• Fermentation

Which type of muscle fibers are more prevalent in marathon runners?

• Fast-twitch fibers

• Slow-twitch fibers

• Cardiac fibers

• Smooth fibers

What is the main characteristic of fast-twitch fibers?

• Contract slowly and resist fatigue

• Contract quickly and fatigue faster

• Use aerobic respiration

• Found in posture muscles

Which muscle contracts to straighten the arm?

• Biceps

• Triceps

• Deltoid

• Pectoral

What is the ratio of motor neurons to muscle fibers in fingers?

• 1:100

• 1:3

• 1:50

• 1:10

Which type of muscle fibers are more prevalent in sprinters?

• Slow-twitch fibers

• Fast-twitch fibers

• Cardiac fibers

• Smooth fibers

What type of respiration do fast-twitch fibers primarily use?

• Aerobic respiration

• Anaerobic respiration

• Photosynthesis

• Fermentation

Why do fingers move with more precision than arms?

• They have more muscle fibers

• They have a lower motor neuron to muscle fiber ratio

• They are stronger

• They have more bones