What Provides a Boundary Between the Internal and External Environment

question 44

Multiple Choice

What provides a boundary between the internal and external environment of all cells?

• A) hydrophilic heads and hydrophilic tails
• B) a phospholipid trilayer
• C) a phospholipid bilayer
• D) a phospholipid layer
• E) hydrophobic heads and tails

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Definitions:

Bilateral Anterior Cingulotomy

a neurosurgical procedure involving selective destruction of areas in the anterior cingulate cortex to relieve symptoms of mental disorders resistant to other treatments.

Major Depression

A mental disorder characterized by a persistent and severe low mood that is accompanied by low self-esteem and by a loss of interest or pleasure in normally enjoyable activities.

Posttraumatic Stress Disorder

A psychiatric disorder that may occur in people who have experienced or witnessed a traumatic event, characterized by flashbacks, nightmares, and severe anxiety.

Virtual Reality Exposure Therapy

A method of psychotherapy that uses virtual reality technology to expose patients to simulations of their phobias or traumatic experiences in a controlled environment.