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Nursing QUESTION #9194
Question 1
In Betty Neuman's Systems Model, the flexible line of defense differs from the normal line of defense in that it:
  • Is the innermost protective structure surrounding the basic structure
  • Acts as a buffer that prevents stressors from penetrating the normal line of defense✔️
  • Represents the client's stable, usual wellness state
  • Is activated only after a stressor has breached all external defenses
Correct Answer Explanation
Correct Answer: B

Neuman's Systems Model uses concentric circles to represent protective mechanisms:
StructureDescription
Flexible Line of DefenseOutermost, accordion-like buffer; dynamic; first protection against stressors
Normal Line of DefenseMiddle layer; represents the client's usual wellness state over time
Lines of ResistanceInnermost; protect the basic structure when other lines are penetrated
Basic Core StructureCentral; survival factors common to all humans
The flexible line expands and contracts based on factors like sleep, nutrition, and stress — acting as a dynamic buffer before stressors reach the more stable normal line of defense.