When Joe Student holds out his hand to receive money from his father, the movement may be described as

Correct Answer: B

Rationale: Holding out a hand palm-up involves extending the forearm (straightening) and supinating (rotating palm upward). Flexion bends the arm, pronation turns the palm down, abduction moves away from midline, and rejection/depression aren’t standard terms here.

Correct Answer: B

Rationale: The adult human skeleton typically consists of 206 bones. This number accounts for the fusion of certain bones (e.g., sacrum, coccyx) that occurs after infancy, when the count is higher (around 270). 210 is close but slightly over, while 180 and 126 are significantly under the standard count.

Correct Answer: A

Rationale: The appendicular skeleton includes the pectoral girdles (4 bones), upper limbs (60 bones), pelvic girdle (2 bones), and lower limbs (60 bones), totaling 126 bones. The axial skeleton has 80 bones, making 100 and 110 incorrect estimates.

Correct Answer: A

Rationale: Most cranial bones (e.g., frontal, parietal, occipital) are flat, providing a broad, protective shield for the brain. Irregular bones (e.g., sphenoid, ethmoid) exist in the skull, but flat bones predominate in the cranium.

Correct Answer: A

Rationale: The mandible (lower jaw) is the only movable bone of the skull, articulating at the temporomandibular joint for actions like chewing. The hyoid, while in the neck, is not part of the skull and doesn’t move in the same context.