Musculoskeletal System Review

Front

What provides energy for muscle contraction and relaxation?

Back

ATP (Adenosine Triphosphate) is the energy currency of the cell, used for muscle contraction and relaxation.

Front

What are thin filaments in muscles?

Back

Actin is a protein that forms thin filaments in muscle fibers, playing a crucial role in muscle contraction.

Front

What type of joint allows for rotational movement?

Back

Pivot joint allows for rotational movement, such as the neck.

Front

What is the movement called when a limb is straightened or extended?

Back

Extension is the movement that increases the angle between body parts.

Front

What are the thick filaments in a myofibril?

Back

Myosin is the protein that forms thick filaments in muscle fibers.

Front

What is the role of troponin in muscle contraction?

Back

Troponin is a protein that helps regulate muscle contraction by binding to calcium ions.

Front

What is the function of tropomyosin in muscle fibers?

Back

Tropomyosin is a protein that blocks the binding sites on actin filaments, preventing muscle contraction when not activated.

Front

What type of joint allows for back-and-forth movement like a door?

Back

Hinge joint allows for back-and-forth movement, like the elbow or knee.

Front

What is flexion in terms of joint movement?

Back

Flexion is the movement that decreases the angle between body parts, like bending the elbow.

Front

What is abduction in joint movement?

Back

Abduction is the movement of a limb away from the midline of the body.