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14 Cards in this Set
- Front
- Back
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Homeostasis |
The condition of dynamic equilibrium (balance) in the body's internal environment due to the constant interaction of the body's many regulatory processes |
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Intercellular fluid (ICF) |
Found inside body cells; also called cytosol |
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Extracellular fluid (ECF) ...cont |
Found outside body cells |
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Interstitial fluid ...cont |
Found between body cells |
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Blood plasma ...cont |
Found within blood vessels |
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Lymph ...cont |
Found within lymphatic vessels |
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Cerebrospinal fluid (CSF) |
Found around and within the brain and spinal cord |
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Interstitial fluid |
Body's internal environment. - exchange between intercellular and interstitial occurs across plasma membrane - exchange between interstitial and blood plasma occurs across blood capillary |
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What is homeostasis regulated by? ...cont |
Nervous system and endocrine system, acting together or independently, using feedback systems |
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Nervous system |
Detects changes and sends nerve impulses to counteract the disruption. Nerve impulses cause rapid changes |
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Endocrine system |
Regulates homeostasis by secreting hormones. Hormones usually work more slowly |
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Feedback systems |
A cycle of events in which information about the status of a condition is continually monitored and fed back to a central control region - receptor - control centre - effector |
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Negative feedback systems |
Reverses a change in a controlled condition |
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Positive feedback system |
Tends to strengthen or reinforce a change in one of the body's controlled conditions |
