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

Question

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

BlackTom AI · Accepted Answer

Let’s break down each statement about the appendicular skeleton and examine what they imply.
Option 1: 'The adult appendicular skeleton consists of 126 bones.' This aligns with anatomical textbooks, which state that the appendicular skeleton contains the bones of the limbs and girdles, totaling 126 in an adult. This is a factual count that fits standard human anatomy.
Option 2: 'The pectoral girdle and upper limbs are specialized for strength.' While these structures do bear loads, their primary design is for mobility, range of motion, and dexterity rather than maximal strength. The pectoral girdle, in particular, is very light and highly mobile, which can limit pure strength compared to the pelvic girdle and lower limbs in weight-bearing tasks.
Option 3: 'The pelvic girdle and lower limbs are specialized for flexibility and increased range of motion.' This is not accurate: the pelvic girdle and lower limbs are specialized more for stability, weight-bearing, and locomotion efficiency. Increased flexibility is not their defining feature; rather, precise alignment and strength support movement and posture.
Option 4: 'It consists of the skull, vertebral column, and ribcage.' This describes the axial skeleton, not the appendicular skeleton. The axial skeleton includes the skull, vertebral column, and ribcage, whereas the appendicular skeleton comprises the limbs and girdles.
Taking all options together, the first statement is the one that accurately characterizes the appendicular skeleton, while the others contain mischaracterizations about structure and function.

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