Lab 11 – Flashcards
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osmosis
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movement of water across a semi-permeable membrane
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How does water move across a membrane?
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moves toward a high concentration of solute
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hypertonic
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shrink bc water is moving out
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isotonic
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normal
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hyptonic
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burst bc water is moving in
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What was the diagnosis for Clark?
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cerebral edema- associated with decreased blood Na levels and increased metric pressure
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What direction was the water moving when Clark had cerebral edema?
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out
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What treatment was clark given?
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a hypertonic solution- decreased metric pressure and achieved homeostasis
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What direction did the water move after Clark was treated with a hypertonic solution?
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water moved in to the vessel
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Summary of clinical observations for Clark
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increased Na concentration in matrix of brain caused water from blood to move in to the brain which increased the matrix pressure. Pressure caused the neuron firing rate to increase which increased the likelihood of seizures. Hypertonic saline was administered to increase Na in blood which caused water to move back into veins. Matrix Pressure is normal and the NFR decreased which stop seizures.
