Term
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Definition
-Mantenance of a relatively stable internal enviroment despite continuous outside changes.
-A dynamic state of equilibrum |
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Term
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Definition
| Organ systems working with other organ systems to preform nescessary life functions. |
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Term
| Homeostatic Control Mechanisms Definition |
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Definition
-Involve continuous monitoring and regulation of many factors(variables).
-Nervous and endocrine systems accomplish the communication via nerve impulses and hormones. |
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Term
| Homeostatic Control Mechanisms Timeline |
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Definition
1. Short-term physical stressor that results in a predicatble disturbance of homeostasis.
2. Mobilize sugar from fat cells and liver into your bloodstream.
3. Increase blood preasure;allows this sugar to get to our working muscles in 2-3 seconds.
4. We shut down long-term projects to conserve energy;inhibits digestion, inhibits reproduction. |
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Term
| Why Homeostatic Control Mechanisms? |
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Definition
| These disturbances in homeostasis allow us to deal with a dynamic external enviroment by modulating our internal enviroment appropriately. |
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Term
| What is Long-term Disruptions in Homeostasis? |
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Definition
-Stress has negative consequences when we stop acting like other mammals and do not return to Homeostasis.
-We do things that many other animals do not do, we get chronically psychologically stressed. |
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Term
| Long-term Disruptions in Homeostasis Effects |
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Definition
-Exposure to chronic stress is associated with increased risk of mental and physical illiness.
-Increase risk of disease
-May allow destructive positive feedback mechanisms to take over (e.g. heart attack) |
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Term
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Definition
1.Stimulas
2.Receptor
3.Afferent signals/action potental
4.Control center
5.Efferent signals
6.Effector
7.Response |
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Term
| Name at least 5 Homeostasis Disruptions |
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Definition
-medicines -Infection
-Sleep deprivation -Temperature
-Stress -Hydration
-Virus -Pollution
-Injury |
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Term
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Definition
-Monitors the enviroment
-Responds to Stimuli |
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Term
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Definition
-Determines the set point at which the variable is maintained
-Receives input from receptor
-Determines appropriate response |
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Term
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Definition
-Recieves output from control center
-Provides the means to respond
-Response acts to reduce ot enhance the stimulus |
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Term
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Definition
-The response reduces or shuts off the orignal stimulus
-The response does the opposite of the stimulus |
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Term
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Definition
-The response enhances or exaggerates the orignial stimulus
-May exhibit a cascade or amplifying effect
-Least common feedback |
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Term
| Negative Feedback Example |
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Definition
-Blood Volume
-Body Temperature
-Stress Hormones |
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Term
| Positive Feedback Example |
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Definition
-Enhancement of labor contractions by oxytocin
-Blood clotting
-Platelet plug formation |
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