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10 Cards in this Set
- Front
- Back
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Levels of Organization
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Chemical
Cellular Tissues Organ System Organism |
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Basic Life Processes
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Metabolism
Responsiveness Movement Growth Differentiation Reproduction |
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Catabolism
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Part of metabolism; breaking down of substances into their simpler building blocks
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Anabolism
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Part of metabolism; synthesizing more complex cellular structures from simpler substances (build up)
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Body Fluids
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Intracellular (ICF) 2/3
Extracellular (ECF) 1/3 - Interstitial fluid 80% - Blood plasma 20% EX: Lymphatic fluid; Cerebrospinal fluid; Synovial fluid; Aqueous and vitreous humor |
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Homeostasis
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Equilibrium in the body's internal environment.
- A dynamic state of equilibrium or balance, in which internal conditions vary, but always within relatively narrow limits. |
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Two basic types of homeostatic regulators are:
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1. Negative feedback controls, in which the system continuously adjust and takes corrective action in order to maintain a factor within normal range. (Hormonal secretions from endocrine glands).
2. On-off switches, in which a response either does or does not occur. (Responses in the nervous system) |
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Negative Feedback
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- Mechanisms that cause the variable to change in a direction opposite to that of the initial change, returning it to its "ideal" value.
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Interaction among the elements of a homeostatic control system
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Paste Picture!!!!!!
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Positive Feedback
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Leads to instability which can produce serious and even fatal results. The initiating stimulus encourages conditions similar to those already existing. A mild degree of positive feedback can be overcome by the normal negative feedback control systems of the body.
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