Muscular System Review

Which of the following is NOT a function of muscles?

• Movement

• Stability

• Posture

• Circulation

Which type of muscle contraction involves muscle tension increasing without a change in muscle length?

• Concentric contraction

• Eccentric contraction

• Isometric contraction

• Isotonic contraction

During which type of muscle contraction does the muscle shorten as it contracts?

• Isometric contraction

• Concentric contraction

• Eccentric contraction

• Isotonic contraction

Which of the following is example of an isometric contraction?

• stationary plank

• triceps dips

• Push-ups

• arm rotations

Which type of muscle contraction occurs during the lifting phase of a bicep curl?

• Isometric contraction

• Concentric contraction

• Eccentric contraction

• Isotonic contraction

During muscle contraction, what do myosin heads bind to?

• Myosin filaments

• Actin filaments

• Calcium ions

• ATP molecules

What role does ATP play in muscle contraction?

• It binds to actin filaments

• It provides energy for cross-bridge formation and detachment

• It releases calcium ions from the sarcoplasmic reticulum

• It forms cross-bridges with myosin heads

Tags

NGSS.MS-LS1-7

What is the primary function of skeletal muscles?

• To enable voluntary movements

• To pump blood throughout the body

• To digest food

• To store fat

What characteristic is associated with skeletal muscles?

• They have a smooth appearance

• They have a striated appearance

• They are found only in the heart

• They are not attached to bones

Which type of muscle fibers are used for rapid, powerful movements?

• Slow-twitch fibers

• Type 1 SO fibers

• Fast-twitch fibers

• Type 2a FOG fibers