APK3110-Ch2-Homeostasis_Spring12

APK3110-Ch2-Homeostasis_Spring12 - CONTROL OF THE INTERNAL...

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CONTROL OF THE INTERNAL ENVIRONMENT CHAPTER 2
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Objectives 1. Define the terms homeostasis and steady state . 2. Diagram and discuss a biological control system. 3. Give an example of a biological control system. 4. Explain the terms negative and positive feedback . 5. Define what is meant by the gain of a control system.
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How to Understand Graphs Figure 2.1 The relationship between heart rate and exercise intensity Independent variable: manipulated by the researcher. Dependent variable: changes as a function of exercise intensity.
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Homeostasis vs. Steady State Homeostasis: maintenance of a constant and normal (resting) internal environment. Steady state: unchanging level of a physiological variable but not equal to the “homeostatic” resting value. Figure 2.2 Changes in body core temperature during submaximal exercise Body temperature reaches a plateau (steady state).
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Figure 2.3 Changes in arterial blood pressure at rest Although arterial pressure oscillates over time, mean pressure remains constant.
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This note was uploaded on 02/15/2012 for the course APK 3110C taught by Professor Dr.christou during the Spring '11 term at University of Florida.

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APK3110-Ch2-Homeostasis_Spring12 - CONTROL OF THE INTERNAL...

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