Anatomy and Physiology Introduction Dr. John M. Bartlett, D.C. Board Eligible Chiropractic...
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Transcript of Anatomy and Physiology Introduction Dr. John M. Bartlett, D.C. Board Eligible Chiropractic...
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Anatomy and PhysiologyIntroduction
Dr. John M. Bartlett, D.C.Board Eligible Chiropractic Neurologist
Certified Clinical Research Associate
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Characteristics of Living
1. Responsiveness – also called irritability1. Simple reflexes – remove hand from hot stove2. Adjustments to environmental changes
1. Adaptability – fur growth in winter, migration, etc.
2. Growth and differentiation1. Grow larger, cells become specialized
3. Reproduction4. Movement5. Metabolism and excretion
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• Anatomy – study of internal and external structures and the physical relationships among body parts.
• Physiology – study of how living organisms perform their vital functions.
• All specific functions are performed by specific structures
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1. Cytology – analysis of internal structure of individual cells.
2. Histology – examination of tissues3. Gross anatomy – also called macroscopic anatomy.
1. Examination of structures visible to naked eye.2. Surface anatomy – study of general form and
superficial markings3. Regional anatomy – anatomical organization of specifc
areas of the body.4. Systemic anatomy – study of structure of organ
systems.5. Developmental anatomy – study of changes of form
and function from conception to physical maturity.
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Homeostasis
• Existence of a stable environment.• Homeostatic regulation – adjustment of
physiological systems to preserve homeostasis.
• Failure of homeostatic regulation leads to illness or death.
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Two general mechanisms in homeostasis
1. Autoregulation – the activities of a cell, tissue, organ, or organ system change automatically when faced with environmental regulation.
2. Extrinsic regulation – results from action of nervous system or endocrine system.
1. Exercise = increase heart rate2. Nervous system – crisis management with rapid, short-
term, specific responses.3. Endocrine system – releases chemical messengers
called hormones.1. Response not immediate and effects last days to weeks.
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Regulatory mechanism1. Receptor – sensor that is sensitive to a particular
environmental change or stimulus.2. Control center or integration center – receives and
processes information supplied by receptor.3. Effector – cell or organ that responds to commands
of control center
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Negative feedback• Effector activated by control center opposes or
eliminates the stimulus.
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Positive feedback
• Initial stimulus produces a response that increases or enhances the response.– Not as common– Important for physiological processes that must be
completed quickly.
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Anatomical landmarks and directional references
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Anatomical position
Supine – lying face up
Prone – lying face down
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Abdominopelvic quadrants
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Abdominopelvic regions
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Planes of body
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Directional references
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Table 1.1
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Body cavities
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