When William Is Handed a Cracker, He Extends Both of His

question 31

Multiple Choice

When William is handed a cracker, he extends both of his hands to receive it. If his motor development is typical for children his age, how old would he be:

• A) 2 years old
• B) 3 years old
• C) 4 years old
• D) 5 years old

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Definitions:

Implantation

The process by which a fertilized egg attaches itself to the wall of the uterus, beginning the stages of pregnancy.

Embryonic Period

The stage in prenatal development that spans from conception to the eighth week, during which major organs and structures begin to form in the embryo.

Neural Tube

The precursor to the central nervous system in embryonic development, which later develops into the brain and spinal cord.

Spinal Cord

A long, thin, tubular bundle of nervous tissue and support cells that extends from the brainstem to the lumbar region, facilitating communication between the brain and the body.