7.4 & 7.5 Muscle Structure and Function Quiz

What are the long cylindrical structures within each muscle fiber called?

• Fascia

• Sarcomere

• Myofibrils

• Myosin

What are the repeated sections within myofibrils known as?

• Sarcomere

• Fascia

• Actin

• Myosin

Which structure is responsible for the contraction of skeletal muscles?

• Fascia

• Myofibrils

• Blood vessels

• Nerves

What is the role of fascia in muscle structure?

• It contracts the muscle

• It bundles muscle fibers

• It stores energy

• It transports blood

What are the two types of muscle fibres?

• Slow-twitch and fast-twitch

• Red and blue

• Long and short

• Thick and thin

What is a characteristic of fast-twitch fibres?

• Contract slowly

• Fatigue rapidly

• High oxygen use

• Long endurance

In 2019, who set the world record for the fastest person to run the 100 m sprint?

• Eliud Kipchoge

• Usain Bolt

• Mo Farah

• Haile Gebrselassie

Which type of muscle fibers are likely to be possessed by elite marathon runners?

• Fast-twitch fibers

• Slow-twitch fibers

• Intermediate fibers

• Explosive fibers

What is the purpose of the "Apply your knowledge" section?

• To introduce new topics

• To test understanding of key concepts

• To provide additional resources

• To encourage practical application of concepts

What occurs during an isotonic eccentric contraction?

• The muscle lengthens

• The muscle shortens

• The muscle remains the same length

• The muscle relaxes