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 B
Explanation
A. Thickening of the epidermis:Aging typically leads to thinning of the epidermis rather than thickening, making skin more fragile.
B. Decreased collagen production:Decreased collagen synthesis and fragmentation of existing collagen in the dermis result in thinning, decreased elasticity, and wrinkling with age.
C. Increased sebaceous gland activity:Sebaceous gland activity generally declines with age, often causing drier skin rather than increased oiliness.
D. Increased number of melanocytes:The number of melanocytes tends to decrease with age, though remaining melanocytes can become more irregular and form age spots.
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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