Patho Hesi 2022-2023 Questions and
Answers 100% Pass
An initial disturbance in a system sets off a chain of events that does not favor stability and often
abruptly displaces a system from its steady state: what is tha
...
Patho Hesi 2022-2023 Questions and
Answers 100% Pass
An initial disturbance in a system sets off a chain of events that does not favor stability and often
abruptly displaces a system from its steady state: what is that?
A. positive feedback
B. negative feedback
C. disease
D. homeostasis ✔✔A. Positive feedback
Positive Feedback ✔✔-less common
- Snowball Effect (some pain/ pressure gets worse and worse)
- examples: clots, sneezing, childbirth
- when childbirth starts there is an increase in hormone production which progressively gets
worse
- May use many means to correct one imbalance(NOT stable)
- Moves away from equilibrium
amplifies change
more of a product = more contractions, more clotting factors
Negative Feedback ✔✔- more common
- self regulating system that helps keep the balance (increase or decrease of output/production)
- If there is not enough it makes more, if there is enough it stops making it
- resist any changes from normal (example = glucose and temp regulation)
-example: thermoregulation- body temp decreases, heating mechanisms activated (shivering),
body temp increases , cooling mechanisms activated (sweating)
reduces change
Disease ✔✔- the disruption in homeostasis or deviation from normal
- body is no longer functioning normally
- cellular process leads to disease
Homeostasis ✔✔- dynamic process that is always shifting/changing (give and take system)
- the body likes things just so (temp, pH, dilution, shape)
- equilibrium is necessary for all cells
- stable process, self regulating
- can affect proteins to be in proper function/ form, release of oxygen in the muscl
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