Examine This Close-Up of the Placenta (On the Left of the Figure

question 39

Multiple Choice

Examine this close-up of the placenta (on the left of the figure below) .
Why do the chorionic villi have the shape of a tree?

• A)The branches of the chorionic villi create a large amount of surface area for the exchange of nutrients and gases between maternal and fetal blood.
• B)The branches of the chorionic villi allow blood to flow back and forth more rapidly between the capillaries of the mother and her fetus.
• C)The branches of the chorionic villi create more locations where fetal capillaries can fuse directly with maternal capillaries.
• D)The branches of the chorionic villi create more surface area for the production of the amniotic fluid.

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Definitions:

Somatoform Disorder

Mental disorders characterized by physical symptoms without a clear physical cause, where symptoms are thought to be the manifestation of psychological conflicts or distress.

Conversion Reaction

A psychological response where emotional distress is expressed through physical symptoms.

Irrational Fear

A fear that is disproportionate to the actual danger posed, often a symptom of anxiety disorders.

Mania

A mental state characterized by periods of great excitement, euphoria, delusions, and overactivity.