MODULE 3: Homeostasis and Control Systems
Learning Objective 3: Define homeostasis. Listen to Learning Objective 3
Homeostasis (homeo- = "like, resembling, of the same kind"; stasis = “standing still”) means to maintain body functions within specific livable ranges, adjusting to internal and external changes. Temperature, nutrient concentration, acidity, water, sodium,
calcium, oxygen, as well as blood pressure, heart rate, and respiratory rate are some of the internal body variables that must remain within a certain range. When the body fails to maintain internal body variables within a certain range, normal function is interrupted, and disease or illness may result.
Review Questions for Learning Objective 3 Write your answer in a sentence form. (Do not answer using loose words) 1. Which are some of the internal body variables that must remain within a certain range?
2. What happens when internal body variables are out of a certain range? 3. What is homeostasis?
Test for Learning Objective 3 1. Homeostasis means to maintain body functions ___ a. normal for any given age and gender b. at least at the minimum needed to be able to reproduce
c. within specific livable ranges, adjusting to internal and external changes d. within a strict control and prevent any changes at all
Anatomy and Physiology Preparatory Course Textbook 2nd Ed. | Carlos Liachovitzky | CC BY-NC-SA 4.0
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