Muscular System Practice Flashcard

Front

What are thin filaments within the myofibril primarily composed of?

Back

Actin

Front

Which type of muscle is involuntary and most widely found throughout the body?

Back

Smooth muscle

Front

What is the origin of the gluteus maximus muscle?

Back

Ilium, sacrum, and coccyx

Front

Where does the rectus femoris muscle insert?

Back

Anterior midline of the femur

Front

Which muscle is located on the side of the cranium?

Back

Temporalis

Front

What is the primary function of actin in muscle contraction?

Back

Actin interacts with myosin to facilitate muscle contraction.

Front

What type of muscle is responsible for voluntary movements?

Back

Skeletal muscle

Front

What is the role of myosin in muscle contraction?

Back

Myosin heads bind to actin filaments and pull them to contract the muscle.

Front

What distinguishes cardiac muscle from other muscle types?

Back

Cardiac muscle is involuntary and striated, found only in the heart.

Front

What is the primary function of smooth muscle?

Back

Smooth muscle controls involuntary movements in organs and blood vessels.