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17 Cards in this Set
- Front
- Back
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The body is made up of what percentage of water? |
80% |
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Water inside the cells is known as what? |
Intracellular |
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Water outside the cells is known as what? |
Extracellular |
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How much of the body weight is intracellular? |
40% / 2/3 |
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How much of the body weight is extracellular? |
20% / 1/3 |
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Of the 20% extracellular body weight, what percentage is plasma and what percentage is interstitial? |
15% interstitial (3/4) 5% plasma (1/4) |
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What secretions are classed as interstitial? |
Vaginal, nasal, tears, saliva |
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Describe homeostasis |
Maintenance of optimal conditions in which the body functions at its best |
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Name the homeostatic mechanisms |
Osmoregulation (Fluid levels) Thermoregulation (maintain body temp) Excretion of waste (prevent toxic levels) Buffer systems (maintain pH) Blood pressure Correct metabolic rate |
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Biological processes are responsible for movement. When molecules move from high to low - this is known as what? |
Diffusion |
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When water moves from low to high - this is known as what? |
Osmosis |
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Osmotic concentration of a solution in relation to body fluids is known as what? |
Tonicity |
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When osmotic pressure is the same - what is this known as? |
Isotonic (Hartmanns) |
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When osmotic pressure is lower than plasma - this is known as what? |
Hypotonic (NaCL) |
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What happens to the cells in a hypotonic solution? |
The cell swells. Fluid moves from ECF to ICF. This is called LYSIS |
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When osmotic pressure is higher than plasma oxyglobin - this is known as what? |
Hypertonic |
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In a hypertonic solution - what happens to the cell? |
The cell shrinks. Fluid moves from ICF to ECF. This is called CRENATION |
