Eight-Year-Old Ella Can Use Scissors to Cut Small Paper Dolls

question 113

Multiple Choice

Eight-year-old Ella can use scissors to cut small paper dolls out of construction paper,something she could not do at age 3.What best accounts for her improving dexterity?

• A)Increased cortical thickening in the temporal lobe.
• B)Increased myelination of the central nervous system.
• C)Increased bone ossification.
• D)Increased muscle development.

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Definitions:

Pleural

Pertaining to the pleura, the membrane surrounding the lungs and lining the chest cavity.

Abdominal

Relating to the abdomen, the body region between the thorax (chest) and pelvis.

Ventral

Referring to the front or forward part of the body, in contrast to the back or dorsal side.

Homeostasis

The self-regulating process by which biological systems maintain stability while adjusting to conditions that are optimal for survival.