When describing the state of homeostasis to nursing students, the nurse explains that:
A) it is a state of internal stability.
B) it is a state of positive feedback.
C) it is a state of flux and change.
D) it is a state the drives the body away from its resting or set point.
A) it is a state of internal stability.
Explanation: A) Homeostasis indicates the presence of an internal state of balance.
B) The concept of homeostasis is built around the idea of negative feedback. The presence of a physiologic mediator can serve to shut off its own release or the release of another mediator.
C) The body is in a continual state of flux, with some physiologic mechanisms in play and others at rest, so the body must respond appropriately to a multitude of environmental demands. This state of flux is referred to as allostasis.
D) Emotional states can trigger a defensive response by stimulating arousal of the SNS. This sympathetic response could be seen as causing the body to deviate from a normal resting or set point. Other physiologic mechanisms are then brought into play in an attempt to return to the body to the set point–to a state of balance.
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