Which type of joint allows the greatest range of motion?
Saddle
Hinge
Pivot
Ball-and-socket
The Correct Answer is D
A. Saddle: Saddle joints allow biaxial movement (for example the thumb carpometacarpal joint) but do not provide the greatest overall range of motion.
B. Hinge: Hinge joints permit movement primarily in one plane (flexion and extension), limiting their range compared with multiaxial joints.
C. Pivot: Pivot joints allow rotation around a single axis (for example the atlantoaxial joint) and therefore have a restricted range of motion.
D. Ball-and-socket: Ball-and-socket joints permit multiaxial movement including flexion/extension, abduction/adduction, and rotation, offering the greatest range of motion.
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. Medullary cavity:The medullary cavity is the hollow central space within the diaphysis that contains bone marrow; it is not where bone lengthening takes place.
B. Epiphyseal plate:The epiphyseal plate (growth plate) is the area of hyaline cartilage between the diaphysis and epiphysis where new bone is produced, leading to longitudinal bone growth during development.
C. Periosteum:The periosteum is a dense connective tissue layer covering the outer surface of bones and contributes to bone thickness and repair rather than length.
D. Articular cartilage:Articular cartilage covers the ends of bones in joints to provide a smooth surface for movement but is not involved in bone growth.
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