Muscle Tissue and Organization

Front

What is the second step of muscle contraction?

Back

Breakdown of ATP causes myosin to pull on actin causing a power stroke.

Front

Which structure is a connective tissue that surrounds each individual muscle fiber?

Back

Endomysium.

Front

Which is not a type of muscle in the body?

Back

Rough.

Front

Which type of filament is thick and has a head?

Back

Myosin.

Front

Muscle cells need an abundance of calcium to contract. What specialized structure surrounding a myofibril releases calcium?

Back

Sarcoplasmic Reticulum.

Front

What are the three types of muscle tissue?

Back

Skeletal, Smooth, Cardiac.

Front

What is the role of calcium in muscle contraction?

Back

Calcium binds to troponin, causing tropomyosin to move and expose binding sites on actin.

Front

What is the functional unit of a muscle fiber?

Back

Sarcomere.

Front

What is the primary energy source for muscle contraction?

Back

ATP (Adenosine Triphosphate).

Front

What is the difference between voluntary and involuntary muscle?

Back

Voluntary muscles are controlled consciously (e.g., skeletal muscle), while involuntary muscles are not (e.g., smooth and cardiac muscle).