Muscular System and Movement Terminology Quiz

Biceps brachii is responsible for flexing the forearm by pulling the radius towards the humerus.

Origin is where the muscle attaches to the stationary bone, providing stability for movement.

Rectus abdominis, also known as the 'six-pack', flexes the lumbar spine and stabilizes the pelvis.

Abduction is the movement that brings a limb away from the midline of the body, such as raising the arm sideways.

Pronator teres is responsible for pronation of the forearm, rotating the forearm to face palm downwards.

Eccentric contraction occurs when the muscle lengthens as it contracts, often during controlled movements and lowering weights.

Quadriceps extend the leg at the knee joint, crucial for actions like standing and walking.

Flexion is the movement that decreases the angle between two bones, such as bending the elbow.

Teres minor internally rotates the shoulder joint, assisting in various arm movements.

Tendons are the tough connective tissues that attach muscles to bones, transmitting the force generated by muscle contraction to produce movement.

Zygomaticus is known as the 'smiling muscle', as it contracts to lift the corners of the mouth when smiling.

Epimysium is the outermost layer of connective tissue that surrounds a skeletal muscle, providing structural support and protection.

Pectoralis major adducts the shoulder by pulling the arm closer to the body's midline.

Gastrocnemius is responsible for plantar flexion of the foot, essential for actions like walking, running, and jumping.

Supraspinatus initiates shoulder abduction beyond 90 degrees, assisting in lifting the arm sideways.

Adductor magnus internally rotates the hip joint, assisting in various leg movements.

Tibialis anterior dorsiflexes the foot, lifting the toes and the foot towards the shin.