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What Is the Cause of the Massive Amount of Programmed

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Essay

What is the cause of the massive amount of programmed cell death of nerve cells (neurons) that occurs in the developing vertebrate nervous system, and what purpose does it serve?


Definitions:

Down Syndrome

A genetic disorder caused by the presence of all or part of a third copy of chromosome 21.

Physical Development

The biological process that occurs in human beings over time, including growth and changes in the body structure and function.

Developmental Delay

A condition where a child does not reach their developmental milestones at the expected times.

Functional Status

An individual's ability to perform normal daily activities required to meet basic needs, fulfill usual roles, and maintain health and well-being.

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