BODY FLUIDS AND SALT METABOLISM

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BODY FLUIDS AND SALT METABOLISM by Mind Map: BODY FLUIDS AND SALT METABOLISM

1. The intracellular fluid

1.1. Determinants from Potassium

2. The extracellular fuid

2.1. Determinantes from Sodium

3. The estracellular compartment

3.1. interstitial

3.2. Intravascular (blood volume) contains extracellular fluid. The size of intravascular is determined by the overall size of the extracellular fluid.

4. Distribution of fluids CAPILLARY MEMBRANE

4.1. a) The hydrostatic pressure causes fluids to live the vascular space

4.2. b) The higher concentration of proteins in the intravascular compartment as compared with that in interstitial fluid.

4.3. c)Capillary permeability is a further major mechanism that modulates the distribution of fluids.

5. Blood osmolality MEASUREMENT OF SODIUM

5.1. Is the concentration of all the solutes in a given weight of water.

5.2. Most of the osmoles in blood are sodium salts, with lesser contributions from other ions.

5.3. Solutes that are permeable to cell membranes are ineffective solutes because they do not create osmotic pressure gradients across the cell

5.4. The normal circulating sodium range is between 135 mmol/L, sodium is dissolved in plasma water.

6. DEHYDRATION AND EXTRACELLULAR FLUID VOLUME DEPLETION

6.1. Refers to any condition in which the effective circulating volume is reduced.

6.2. The consequence of dehydration is hypernatremia, elevation in serum sodium concentration and therefore effective blood osmolality.

6.3. Common sites for fluid loss are: 1. The intestinal tract 2. The skin 3. The urine

6.4. Reduces the effective circulating volume