Lecture_30_DulaiS09_CommonChallenges

Lecture_30_DulaiS09_CommonChallenges - Common Challenges...

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Common Challenges Bio 001 Spring 2009 Dulai - Lecture 30
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Plants & Animals – Common Challenges 2. What is homeostasis? What are some major challenges to maintaining homeostasis in a multicellular organism? 3. What are the basic levels of anatomical structure involved in the study of physiology of animals? 1. What are anatomy and physiology? How are they related? 4. Why and in what ways does evolution matter to physiology and anatomy? How do physiology and anatomy contribute to our understanding of evolution? 5. What basic strategy do animals use to maintain homeostasis?
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What are anatomy and physiology? • Inter-related disciplines focused on structures and systems that allow organisms to survive and reproduce under a particular range of variable environmental conditions. • Anatomy study of an organism’s structure ·s k e l e t o n · arrangement and types of physical connections among an organism’s parts • Physiology study of function related to survival and reproduction in particular environmental conditions Da Vinci’s Anatomical Drawings · How maintain function under given conditions? · How maintain function as environmental conditions change?
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How are anatomy and physiology united? · Ex. Problem in multicellular organisms: How move materials (resources and wastes) between cells and the external environment? • Contributions to maintenance of homeostasis · Ex. Jellyfish: system of canals infused with seawater · Failure of structural component of either circulatory system, lead to loss of homeostasis . · Ex. Humans: blood vessels of circulatory system conduits for life sustaining blood · Solution: In (most) animals, circulatory system but can take different forms Aurelia sp.
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How does the study of anatomy & physiology differ in unicellular & multicellular organisms? · Individual cells are dependent upon survival of whole to maintain homeostasis at cellular level · Ex. contractile vacuole of Paramecium sp. Unicellular – about structure of single cell & how it works to maintain homeostasis Multicellular – much more complex; cells must work together so that entire organism can survive changing environmental conditions · Homeostasis at level of entire organism depends upon homeostasis of cells · Requires very complex systems of controls & communication!
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Basic Biological Principle The bigger an organism the more complexity it can attain The more complex an organism the bigger it can get
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What are some of the major challenges of maintaining homeostasis in a multicellular organism ? 1 . How to exchange important materials with the environment. · Ex. Gases – acquire O 2 and eliminate CO 2 · Test Yourself: Why are these materials important to metabolism? What processes uses O 2 ? Why? During what process are they consumed or created? Where does this happen in these processes?
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This note was uploaded on 11/18/2010 for the course SS 101 taught by Professor Denver during the Spring '10 term at Alabama.

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Lecture_30_DulaiS09_CommonChallenges - Common Challenges...

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