Introduction%20to%20Human%20Anatomy%20and%20Physiology - PowerPoint PPT Presentation

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Introduction%20to%20Human%20Anatomy%20and%20Physiology

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Introduction to Human Anatomy and Physiology. Chapter 1. Bio 160. Anatomy & Physiology. Anatomy study of structure (includes many levels of organization) ... – PowerPoint PPT presentation

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Title: Introduction%20to%20Human%20Anatomy%20and%20Physiology


1
Introduction to Human Anatomy and Physiology
  • Chapter 1
  • Bio 160

2
Anatomy Physiology
  • Anatomy study of structure (includes many
    levels of organization)
  • Physiology - study of function of body parts
    (each structure is custom-modeled to carry out a
    particular function - structure of a part often
    determines the function (ex. nose lined with
    hairs to perform filtering function))

3
Levels of Organization
  • Atom
  • Molecule
  • Macromolecule
  • Organelle
  • Cell

4
Levels of Organization
  • Tissue
  • Organ
  • Organ System
  • Organism

5
Requirements of Organisms
  • Water
  • Food
  • Oxygen
  • Heat
  • Pressure

6
Homeostasis
  • Homeostasis - maintain stable (constant) internal
    environment

Receptor senses change in internal environment
Set point range that a particular value should
be within
Effector responds to change internal environment
7
Homeostasis
Negative feedback mechanisms are primary
mechanism of control of homeostasis
  • Negative Feedback - response (effector) reverses
    stimulus (receptor)

8
Homeostasis
  • Positive Feedback - response enhances
    (intensifies) stimulus

only 2 good examples labor contractions and
blood clotting
9
Homeostasis
  • Systems that control homeostasis
  • Nervous (fast)
  • Endocrine (slower) uses hormones
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