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:

Immune System

The body's defense mechanism against infectious organisms and other invaders through a series of steps called the immune response.

Muscle Spasm

An involuntary and sudden contraction of one or more muscles, often painful and a sign of muscle strain or neurological conditions.

Tetanus

A bacterial infection characterized by muscle spasms, commonly caused by Clostridium tetani bacteria.