25_Muscle Structure

What is the smallest functional unit of muscle?

• fascicle

• fiber

• myofibril

• sarcomere

What is responsible for force during a muscle contraction?

• cross-bridge

• power stroke

• titin

• H-zone

What muscle fiber is fast twitch and fast fatiguing?

• Type I

• Type IIa

• Type IIb

• Type I and Type IIa

What fiber arrangement is optimal for promoting a greater range of motion?

• parallel

• 10 degree pennate angle

• 20 degree pennate angle

• 45 degree pennate angle

What is directly related to force-producing capabilities? Select all that apply.

• anatomical cross-sectional area

• physiological cross-sectional area

• fiber architecture

• pennation angle