The Digestive Syste1

The Digestive Syste1 - fluid compartments • Approximately...

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The Digestive System Effect of Sympathetic Innervation on Kidney Function o Increased sympathetic activity decreases blood flow to the kidney, decreases filtrate formation, and decreases urine formation. Urine Movement Increased volume in the urinary bladder stretches its wall and activates the micturition reflex. Parasympathetic impulses cause contraction of the urinary bladder and relaxation of the internal urinary sphincter. Reduced somatic action potentials cause relaxation of the external urinary sphincter. Higher brain centers control the micturition reflex. Stretch of the urinary bladder stimulates ascending neurons that carry impulses to the brain and inform the brain of the need to urinate. Body Fluid Compartments Water and ions dissolved in it are distributed in the intracellular and extracellular
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Unformatted text preview: fluid compartments. • Approximately 60% of the total body water is found within cells. • Approximately 40% of the total body water is found outside cells, mainly in interstitial fluid, plasma of blood, and lymph. Composition of the Fluid in the Body Fluid Compartments o Intracellular fluid contains more potassium, calcium, magnesium, phosphate, sulfate ions, and protein than extracellular fluid. o Extracellular fluid contains more sodium, chloride, and bicarbonate ions than intracellular fluid. Exchange Between Body Fluid Compartments o Water moves between compartments continually in response to hydrostatic pressure differences and osmotic differences between the compartments....
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This note was uploaded on 12/04/2011 for the course ANTHRO 2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.

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