Practice 1: Muscle Structure

Front

What is the smallest unit of muscle contraction?

Back

Sarcomere

Front

Which structure is the smallest among muscle fiber, myofibril, and sarcomere?

Back

Sarcomere

Front

What is the smallest component of a myofibril?

Back

Myofilament

Front

What surrounds a fascicle in muscle tissue?

Back

Perimysium

Front

Which myofilament is known to be thick?

Back

Myosin

Front

What is the primary function of a sarcomere?

Back

To facilitate muscle contraction through the sliding filament theory.

Front

What are the two main types of myofilaments?

Back

Actin (thin) and Myosin (thick).

Front

What is the role of actin in muscle contraction?

Back

Actin provides the site for myosin to bind during contraction.

Front

What connective tissue surrounds individual muscle fibers?

Back

Endomysium.

Front

What is the function of perimysium in muscle structure?

Back

It wraps around fascicles, providing support and protection.