Unit 13: Physiology of Fluid Balance - P4, P5, M3, D2 Essay
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P4: Explain the role of the kidney in the homeostatic control of water balance
P5: Explain dysfunction in relation to water balance and possible treatments
M3: Discuss dysfunction in relation to water balance and possible treatments
D2: Analyse the impact on the human body of dysfunctions in relation to water balance
For P4, I’m going to outline the physiological overview of the kidneys and then I am going to explain the renal system. Also I am going to explain the kidneys in more detail.
The physiological overview involves the kidneys processing blood by eliminating any excess mineral salts, urea and water as this provides homeostasis and it enables the body to work effectively. The nephron (which is part of the kidneys) for…show more content… Consequently, the efferent arteriole, which filters blood away from the glomerulus, is tinier in diameter than the afferent arteriole, which carries blood into each glomerulus. This puts blood under high pressure in the glomerulus; thus it forces tiny molecules and liquid out of the capillary and into the Bowman’s capsule. Soon afterwards, the tiny and liquid molecules cross the epithelium of the Bowman’s capsule, the basement membrane and capillary wall in order to get into the Bowman’s capsule and to arrive in the nephron tubules. The consequence of this is that the filtrate (the tiny and liquid molecules) pass along the remainder of the nephron and helpful substances are reabsorbed along the route. Last of all, “the filtrate flows through the collecting duct and passes out of the kidney along the ureter” as mentioned by (Parson’s, R: p128).
Selective reabsorption occurs straight after ultrafiltration and this involves the filtrate running along the proximal convoluted tubule (PCT), “through the loop of Henle, and along the distal convoluted tubule” as cited by (Parson’s, R: p129). But it is important to note that the proximal convoluted tubule’s walls contain microvilli which supply a big surface area for the reabsorption of helpful materials from the filtrate into the blood. Other helpful solutes, for example vitamins, amino acids, glucose