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14 Cards in this Set
- Front
- Back
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Anatomy |
Study of structures of the body |
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Physiology |
Study of functions |
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Characteristics of living organisms |
1.composed of cells 2.reproduction 3.inheritable traits 4.mechanism of inheritance 5.incorporate matter n energy 6.metabolism 7.growth an development 8.responsivness 9.hierarchial organization |
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4 elements=96% of chemical elements |
Carbon, hydrogen, oxygen, nitrogen |
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Organelle |
Small sub cellular compartments that perform 1 or more functions |
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Cell |
Basic unit of life. Smallest entity with all characteristics of living organisms |
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Tissue |
Groups of similar cells thst perform 1 or more functions |
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Organ |
2 or more tissues thst performs 1 or more funtions |
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Organ system |
2 or more organs thst perform 1 or more functions |
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Organismal level |
Fully functioning entity (organism) capable of reproduction |
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Homeostasis |
Ability to maintsin a stable internal environment |
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Requirements for homeostasis |
1. Setpoint- normal level of variable 2. Sensor- measures the actuak level of a variable 3. Control center- compares actual level of a variable with the setpoint. 4. Effector- bring about an action to change the actual level of a variable |
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Negative feedback |
If actual level of variable differs from setpoint; effector will return the actual level to the setpoint |
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Postive feedback |
If actual level differs from setpoint the effector will increase in difference until a function is performed; actual level is returned to setpoint |
