With Regard to the Structure and Function of the Placenta,the

question 7

Multiple Choice

With regard to the structure and function of the placenta,the maternity nurse should be aware of which information?

• A) As the placenta widens,it gradually thins to allow easier passage of air and nutrients.
• B) As one of its early functions,the placenta acts as an endocrine gland.
• C) The placenta is able to keep out most potentially toxic substances.
• D) Optimal blood circulation is achieved through the placenta when the woman is lying on her back or standing.

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Definitions:

Brainstem

The lower part of the brain that connects to the spinal cord, controlling fundamental body functions.

Sleep-Wake Cycles

The natural, circadian rhythm-driven pattern of alternating sleep and wakefulness, closely tied to the 24-hour day-night cycle.

Midbrain

A part of the brainstem that plays an important role in motor movement, particularly movements of the eye, and in auditory and visual processing.

Auditory Pathways

Networks of neural connections through which sound signals are transmitted from the ear to the brain for processing.