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16 Cards in this Set
- Front
- Back
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Role of Na+ in the body
(5) |
1. controls/regulates fluid volume
2. controls water balance 3. prinary regulator of ECF volume 4. chief electrolyte in ECF 5. influential in nervous/muscle cell chemical reactions |
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Role of Ca+ in the body (6)
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1. needed for fundamental metabolic processs
2. major cation for structure of bones/teeth 3. enzymatic cofactor in blood clotting 4. required for hormone secretion/function of cell receptors 5. Directly related to plasma membrane stability/permeability 6. Directly related to transmission of nerve impulse |
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clinical manifestations of hypomagnesemia (5)
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1. assoc. w/ hypocalcemia and hypokalemia.
2. neuromuscular irritability 3. tetany 4. convulsons 5. hyperreflexia |
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Respiratory (Carbonic acid-bicarbonate) bufffer (3)
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1. works w/i min-hrs
2. operates in lungs/kidneys 3. lungs decrease carbonic acid by blowing off CO2 and lv water |
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Common causes of respiratory alkalosis
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Hypoxemia
Hyperventilation |
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Hydrostatic pressure
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1. Commonly called arterial blood press. Press. exerted on blood vessels by vol. of fluid in circ. system.
2. Pushes water into/out of capillary/interstital space |
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Role of K+ in the body (4)
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1. Major ICF cation
2. Essential fo normal cellular func. 3. Req. for glycogen/glucose deposition in liver/skeletal muscle cells 4. maintains resting membrane potential |
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Renal buffer
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1. Works in 24-72 hrs
2. Secrete H+ into urine 3. reabsorb bicarbonate |
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Clinical manifestations of hypocalcemia
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1. increased neuromuscular excitability
2. Decreases block of Na+ into cell 3. convulsions 4. tetany |
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What are the 3 buffer systems
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Repiratory
Renal Blood |
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how do you measure active Ca+ in the blood
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ionized Ca+ test
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What is the most reliable mehod for measuring body fluid volume
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Body weight
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What are the effects of ADH on water/Na+ balance in the body
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Decreases reabsorption of water into plasma from distal tube/collecting ducts decreasing osmolality
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What are the effects of Aldosterone on water/Na+ balance in the body
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↑ Aldosterone =↑ Na+ & H2O↓ K+
↓ Aldosterone= ↓ Na+ & H2O ↑ K+ |
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Clinical manifesations of hypernatremia (5)
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1. Thirst
2. fever 3. dry mucous memb 4. reslessness/muscle twitching 5. hyperreflexia |
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Role of magnesium in the body
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1. cofactor in IC enzymatic reactions
2. neuromuscular excitability 3. important role in smooth muscle contraction/relaxation |
