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 D
Explanation
A. Osteoclast — builds new bone:Osteoclasts are large multinucleated cells that resorb (break down) bone matrix during remodeling rather than building new bone.
B. Chondrocyte — breaks down bone tissue:Chondrocytes produce and maintain cartilage matrix and do not directly break down bone tissue.
C. Osteoblast — maintains bone matrix:Osteoblasts synthesize and secrete osteoid (new bone matrix) and initiate mineralization; maintenance of the mature matrix is primarily the role of osteocytes.
D. Osteocyte — monitors and maintains bone tissue:Osteocytes are mature bone cells embedded in matrix that act as mechanosensors and help regulate mineral homeostasis and maintenance of bone tissue.
Correct Answer is B
Explanation
A. Clavicle:The clavicle is part of the pectoral (shoulder) girdle and belongs to the appendicular skeleton, not the axial skeleton.
B. Sternum:The sternum is a central bone of the thoracic cage (breastbone) and is part of the axial skeleton.
C. Femur:The femur is the thigh bone of the lower limb and is part of the appendicular skeleton.
D. Scapula:The scapula (shoulder blade) is part of the pectoral girdle and belongs to the appendicular skeleton.
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