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Chapter 20

by: Aimee Castillon

Chapter 20 70955 - BIOL 104 - 001

Aimee Castillon
GPA 3.61
Introductory Biology II

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About this Document

Dr. Luther's BIOL 104 notes taken last spring
Introductory Biology II
Class Notes
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This 3 page Class Notes was uploaded by Aimee Castillon on Thursday September 3, 2015. The Class Notes belongs to 70955 - BIOL 104 - 001 at George Mason University taught by TBA in Fall 2015. Since its upload, it has received 29 views. For similar materials see Introductory Biology II in Biology at George Mason University.


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Date Created: 09/03/15
acastil7amuedu BIOL 104 Spring 2015 Chapter 20 objectives The hierarchy structural organization in an animal 1 Explain relationship bt anatomy and physiology 2 Describe structural hierarchy of the body from cell to organism N 9 IA 202 Animal39s form reflects natural selection 3 Describe general Sharks seals and penguins have streamlined tapered bodies Why structures and functions of Convergent evolution major tissues of human body 0 Animal39s size and shape are fundamental aspects of form that affect the way it interacts with its environment 4 Define homeostasis and 0 BIG these shapes and sizes gave their ancestors a selective advantage several examples 0 Natural selection involves editing rather than creating diversity 203 Tissues are groups of cells with a common structure and function types of epithelial tissues 0 simple squamous air sacs of lungs simple cuboidal kidney simple columnar intestine pseudostratified ciliated columnar Respiratory tract stratified squamous 0000 o connective tissue can be grouped into 6 major types supporting cells insulate axons and nourish neurons heart has epithelial connective and nervous tissues 0 Epithelia line the heart chambers o Connective tissues make the heart elastic o Neurons regulate contractions o organ system usually consists of many organs 0 Each organ system has one or more function 2011 CONNECTION New imaging technology reveals the inner body new technologies show body organs without surgery Xrays help to see bones and teeth Computed tomography CT detects differences in normal and abnormal tissues in organs Positronemission tomography PET helps identify metabolic processes at specific body locations I resists damage I decreases water loss I prevents penetration by microbes I sensory information I synthesis of vitamin D 0 important for bone and muscle health I temperature regulation 0 hair and nails are also part of this system 12315 Exchanges with the External Environment Structural adaptations enhance exchange blt animals and their environment adaptations that increase surface area promote exchanges with the environment What is homeostasis How do humans promote homeostasis Sweat active Animals regulate their internal environment 0 humans promote homeostasis by adding clothing when we re cold drink water when dehydrated Eating when our calories are running low Urinating when our bladders are full


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