Question at position 1 Which of the following statements about the appendicular skeleton is correct?The pelvic girdle and lower limbs are specialized for flexibility and increased range of motion.The adult appendicular skeleton consists of 126 bones.It consists of the skull, vertebral column, and ribcage. The pectoral girdle and upper limbs are specialized for strength.

Question

Question at position 1 Which of the following statements about the appendicular skeleton is correct?The pelvic girdle and lower limbs are specialized for flexibility and increased range of motion.The adult appendicular skeleton consists of 126 bones.It consists of the skull, vertebral column, and ribcage. The pectoral girdle and upper limbs are specialized for strength.

BlackTom AI · Accepted Answer

The question asks which statement about the appendicular skeleton is correct, and provides four options to evaluate.
Option 1: 'The pelvic girdle and lower limbs are specialized for flexibility and increased range of motion.' This is misleading; while the appendicular skeleton enables mobility via the pelvic girdle and lower limbs, many aspects of the lower limbs prioritize stability, weight-bearing, and strength for locomotion rather than maximum flexibility. The statement oversimplifies specialization by attributing primarily to flexibility.
Option 2: 'The adult appendicular skeleton consists of 126 bones.' This matches the commonly cited anatomical fact that the appendicular skeleton (girdles and limbs) comprises 126 bones in an adult, reflecting the total beyond the axial skeleton. This is the precise factual claim that aligns with standard anatomy.
Option 3: 'It consists of the skull, vertebral column, and ribcage.' This describes components of the axial skeleton, not the appendicular skeleton. The skull, vertebral column, and ribcage are central axis structures, so this option mislabels the system being described.
Option 4: 'The pectoral girdle and upper limbs are specialized for strength.' While they do contribute to strength, this statement is overly narrow and excludes the broader functional emphasis of the appendicular skeleton, which also includes flexibility for movement and a range of tasks. It also misstates the general cross-section of specialization by focusing only on strength without acknowledging other functional aims like precision and dexterity.
In summary, Option 2 is correct because it is a direct, factual count of bones in the adult appendicular skeleton, while Options 1, 3, and 4 either mischaracterize the functional emphasis, mislabel the skeletal system, or provide an incomplete description of appendicular specialization.

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