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28 Cards in this Set
- Front
- Back
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Posterior is the same as _________.
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Dorsal
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Anterior is the same as ______.
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Ventral
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Name all eleven body systems.
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Integumentary system
Skeletal system Muscle system Nervous system Digestive system Endocrine system Circulatory system Respiratory system Immune system Lymphatic system Urinary system Reproductive system |
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Anatomy
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Science dealing with structure
How the body is structured |
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Physiology
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Science dealing with function
How body systems function |
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Structure determines ____.
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Function
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Function modifies ____.
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Structure
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Functional Characteristics for Maintaining Life (8)
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1. Boundaries
2. Movement 3. Responsiveness or Irritability 4. Digestion 5. Metabolism 6. Excretion 7. Reproduction 8. Growth |
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Environmental Factors Necessary to sustain Life (5)
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Water
Food Oxygen Body Temperature Pressure |
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Molecules composed of ____.
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Atoms.
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Organelles composed of ____.
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molecules
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Organism is composed of____.
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Organ systems.
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Organ systems composed of ___.
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Organs.
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Organs are composed of _____.
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Tissues.
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Tissues are composed of ______.
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Cells
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Tissues Organs and Organ Systems (3 pts)
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Are all interrelated and interdependent
Function to maintain a constant internal environment for the survival of cells This relatively constant internal state is called homeostasis |
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Homeostasis
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stable internal conditions regardless of external conditions…needed to maintain life.
Basis for all physiological regulating mechanisms Walter Cannon coined term |
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Structures Necessary for Homeostatic Control (3)
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Receptor
Integrator Effector |
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Receptor
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Senses change
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Integrator
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Control center that responds
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Effector
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Structures that restore homeostasis
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Negative Feedback Loop
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System senses a change and activates mechanisms to reverse it
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Negative Feedback, Set Point
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Room temperature does not stay at set point of 68 degrees -- it only averages 68 degrees
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Temperature Set Point = _______.
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37 degrees C ( 98.6 0 F )
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Human Thermoregulation
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Brain senses change in blood temperature
If overheating, vessels dilate in the skin and sweating begins If too cold, vasoconstriction in the skin and shivering begins |
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Homeostatic Control of BP
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Circulatory stretch receptors detect a drop in BP
Cardiac center in brainstem,sends out nerve signals Heart slowed and BP lowered |
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FEEDBACK mechanism for Homeostatic regulation
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Process of taking output information from a system & putting it back into system as input for instruction.
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FEEDBACK mechanisms may be
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Negative
Positive |
