Muscle Structure

Front

What is the basic contractile unit of muscle contraction?

Back

Sarcomere

Front

Which protein filament is primarily responsible for muscle contraction?

Back

Myosin

Front

What is the correct order of muscle structures from largest to smallest?

Back

Muscle -> Muscle fascicles -> Muscle fibers -> Myofibrils -> Sarcomeres

Front

What connective tissue sheath envelops each primary bundle of muscle fibers?

Back

Perimysium

Front

What is the function of actin in muscle contraction?

Back

Actin serves as a track for myosin to pull on during muscle contraction.

Front

What is the role of myofibrils in muscle fibers?

Back

Myofibrils are the contractile elements of muscle fibers, containing sarcomeres.

Front

What is the outermost connective tissue layer surrounding a muscle?

Back

Epimysium

Front

What is the term for the muscle fiber membrane?

Back

Sarcolemma

Front

What are the two main types of protein filaments in muscle fibers?

Back

Actin and Myosin

Front

What is the function of the endomysium?

Back

Endomysium surrounds individual muscle fibers, providing support and insulation.