Which synovial joint type allows movement in all directions, such as the shoulder?
Saddle joint
Pivot joint
Hinge joint
Ball-and-socket joint
The Correct Answer is D
A. Saddle joint: Saddle joints allow biaxial movement (e.g., thumb carpometacarpal joint) but do not permit movement in all directions.
B. Pivot joint: Pivot joints allow rotation around a single axis (e.g., atlantoaxial joint) and therefore do not provide multiaxial movement.
C. Hinge joint: Hinge joints permit movement primarily in one plane (flexion/extension) like the elbow and do not allow movement in all directions.
D. Ball-and-socket joint: Ball-and-socket joints (for example the shoulder and hip) permit multiaxial movement including flexion/extension, abduction/adduction, and rotation, allowing the greatest directional range.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Hormone production:While bone cells secrete factors (for example osteocalcin) that have endocrine effects, classical major functions of the skeleton focus on support, protection, mineral storage, and hematopoiesis rather than systemic hormone production.
B. Mineral storage:The skeleton stores minerals (notably calcium and phosphate) and helps regulate their blood levels.
C. Support and protection:The skeleton provides structural support for the body and protects vital organs (for example the skull protects the brain).
D. Blood cell formation:Hematopoiesis occurs in red bone marrow, producing red cells, white cells, and platelets.
Correct Answer is B
Explanation
A. Scapula: The scapula is part of the appendicular skeleton (shoulder girdle).
B. Sternum: The sternum is a central bone of the thoracic cage and belongs to the axial skeleton.
C. Humerus: The humerus is a limb bone (appendicular skeleton).
D. Femur: The femur is a lower limb bone (appendicular skeleton).
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