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img043 - Chapter 20a(19 new Fluid and electrolyte balance...

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Unformatted text preview: Chapter 20a (19 new): Fluid and electrolyte balance Thanh-manta: mum-Immune- e-u [ mflflnmlml III—unis: Hence unmet-drone": W hmmmm ~h mm“ {lulu-Wm” [ WWW-"mohair: ”L volume-mm ‘ f Manama-human ,, .- Wham-0mm. Won ”comm: 7 muwm fimwmam Whhwm "" hummus-mum *— unt- Dana l n?‘ "II-m Willem. mum i ll’: danish-Mormon! Ettcctor *Wmmwmmm Mumwhmhmhm Factors aflectlng water balance = 15wa Opening screen: To maintain homeostasis, the human body must be kept in balance. To be in balance means that what comes into the body and what is produced by the body mustqu the sum ofwhat the body uses and what is eliminated from the body. The body is always striving for homeostasis and has unique ways to maintain this balance. In this module we will focus on how the body maintains fluid and electrolyte balance. Go to the next screen: We have looked at the processes by which the kidneys filter blood. Now we will take a look at how reabsoption and secretion across the renal tubules are controlled to maintain normal plasma composition and volume. It’s a classic fwdback control mechanism — the variable is plasma volume, there are sensors in various parts of the body that monitor volume, the hyperthalamus is the integrator of the information, and the kidney is the effector. 5 Click on the Goals Button: In this module we will overview how the kidneys regulate water and electrolyte balance so that plasma volume and composition is maintained within the normal range, Click the Home Menu Button Click the Plasma Content Button: Nearly all the water enters the body through the digestive tract in the food and drink we consume. A small amount is produced by cellular metabolism (such as oxidative phosphorylation or condensation reactions). Water leaves the body through several routes including respiration, sweating, elimination of feces and excretion of urine by the kidneys. Total body input is approximately 2.5 L/day. Body water output includes excretion in die urine and feces and loss through sweat and respiration totaling approximately 2.5 L/day. When input equals output the body is in equilibrium. Only the kidneys regllate the rate of water loss for the purpose of maintaining water ...
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