The Etiology of Down Syndrome Involves

question 71

Multiple Choice

The etiology of Down syndrome involves

• A) abnormal cell division of a sperm from the father.
• B) abnormal cell division of an egg from the mother.
• C) incomplete union of the ovum and sperm.
• D) two sperm impregnating the ovum.
• E) a metabolic disorder of the systems that rid the brain of waste.

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Definitions:

Mesothelium

A simple squamous epithelium that lines the major cavities of the body and covers the surface of internal organs.

Visceral

Relating to the internal organs of the body, especially those within the chest or abdomen.

Parietal

Relating to the walls of a cavity or part, often used in reference to a region of the brain or bones of the skull.

Pseudostratified Ciliated Columnar

A type of epithelial tissue lining some air passages of the respiratory system, characterized by a single layer of cells with varying heights that appear stratified.