Muscular System

Front

What happens to actin during sarcomere contraction?

Back

Actin moves closer to the M line.

Front

Which structure contains all the others: Sarcomere, Myofilament, Myofibril, or Muscle fiber?

Back

Muscle fiber contains all the others.

Front

What is the cell membrane of muscle fibers called?

Back

Sarcolemma.

Front

Which myofilament has hands to pull the other one?

Back

Myosin.

Front

Which types of muscle tissue have striations?

Back

Skeletal muscle and cardiac muscle.

Front

What is the basic contractile unit of a muscle called?

Back

Sarcomere.

Front

What are the two main types of myofilaments?

Back

Actin and Myosin.

Front

What is the role of myosin in muscle contraction?

Back

Myosin pulls actin filaments to shorten the sarcomere.

Front

What is the function of the sarcolemma?

Back

It acts as a barrier and regulates the entry and exit of substances in muscle fibers.

Front

What is the difference between skeletal muscle and smooth muscle?

Back

Skeletal muscle is striated and voluntary, while smooth muscle is non-striated and involuntary.