A Newborn Boy Does Not Pass Meconium in the First

question 4

Multiple Choice

A newborn boy does not pass meconium in the first 24 hours. His abdomen is distended, and he begins vomiting. Hirschsprung's disease is suspected. Which of the following is virtually absent from the constricted segment of the colon in this patient?

• A)Blood flow
• B)Circular smooth muscle
• C)Ganglion cells
• D)Mucosa
• E)Serosa

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Definitions:

Trisomy

Chromosome condition in which a diploid cell has one more chromosome than normal; designated as 2n + 1.

Extra Copy

In genetics, refers to an additional copy of a gene or chromosome segment, potentially leading to variations in traits or disease susceptibility.

Chromosome

A structure within cells that contains genetic information in the form of DNA, essential for the control of cell activities and inheritance.

Trisomy 21

A genetic disorder caused by the presence of an extra 21st chromosome, also known as Down syndrome.