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Which of the following correctly identifies the active and passive components of the human locomotor system?

• Bones are active, muscles are passive.

• Muscles are active, bones are passive.

• Joints are active, ligaments are passive.

• Tendons are active, cartilage is passive.

What are the primary functions of the head skeleton?

• To support the body's weight and allow movement.

• To protect the brain and form facial features.

• To protect the heart and lungs, and aid in breathing.

• To support the limbs and facilitate grasping.

Which type of muscle works under conscious control?

• Smooth muscle

• Cardiac muscle

• Striated muscle

• Both smooth and cardiac muscle

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Which type of joint allows free movement in all directions, such as rotating the arm at the shoulder?

• Hinge joint

• Saddle joint

• Pivot joint

• Ball-and-socket joint