Looking at the Concordance Rates for Autism Found in Twin

question 63

Multiple Choice

Looking at the concordance rates for autism found in twin studies and family studies, Newschaffer and colleagues (2007) believe that autism is primarily the result of ____.

• A) genetic factors
• B) genetic and environmental factors
• C) environmental factors
• D) sociocultural factors

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Definitions:

Erythrocyte

A type of blood cell that is typically disc-shaped and responsible for transporting oxygen and carbon dioxide throughout the body; also known as a red blood cell.

Voice Box

The larynx, an organ in the top of the neck involved in breathing, producing sound, and protecting the trachea against food aspiration.

Larynx

The organ at the upper end of the trachea that contains the vocal cords.

Nasal Cavity

The large air filled space above and behind the nose in the middle of the face, an important part of the respiratory system.