Renal System

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The Renal System Is Effected By Long Term Stress

The Renal System Is Effected By Long Term Stress


It is normal to think that the function of the renal system is excretion, but this is only one, and not the most important of the reasons (Tsigos, Chrousos, 2002, pp. 865-871). Its function is to regulate the balance of the internal environment, for it exists in both the excretion of metabolites, such as retention of analytes that the body needs (ions) also has an endocrine function, and that secretes substances that could be considered as hormones: renin, kallikrein, erythropoietin and prostaglandins. The kidney performs its functions through several mechanisms are:

Glomerular filtration

Tubular re-absorption


Excretion through the urine (Bruce, 2004, pp. 455-457).

At the level, of de-proteinized plasma ultra filtration Glomerular (not filtered proteins theoretically) but then at the level of the renal tubules, most of the filtrate reabsorbs. This may seem like extra work, but can be explained from an evolutionary standpoint. The source of this leak was single-celled organisms that being in an environment hypotonic should take the leftovers, and then the meter should appear multi cellular into water (filtration-absorption) (Tsigos, Chrousos, 2002, pp. 865-871). Morph functional unit of the kidney is the nephron, which consists of a Glomerular and a tubule, we distinguish between a proximal tubule has the loop of Henle, distal tubule that then flows into the collecting ducts, and the fluid exits them and it is urine. The leak occurs in the Glomerular, re-absorption and tubular secretion. There are 2 types of nephron, are the cortical (cortex), and juxtaglomerular (bone). The capillaries distribute in parallel with the Glomerular system (Bruce, 2004, pp. 455-457).


Physiological activities of the kidney

The main function of the kidneys is to filter metabolic waste products and excess sodium and water from the blood and facilitate their elimination from the body. They also help regulate blood pressure and red blood cell production (Tsigos, Chrousos, 2002, pp. 865-871). Part of each kidney called the urethra tube that carries urine from the central collection area of the kidneys (renal pelvis) into the bladder. From there, the urine flows outward from the body through the urethra. Each kidney has about a million units in charge of filtering, which is known as nephron (Bruce, 2004, pp. 455-457). A nephron consists of a round hollow structure called Bowman's capsule, which contains a network of small blood vessels (the Glomerular). These two structures make up what is known as a renal corpuscle. Blood enters the Glomerular through the afferent arteriole and leaves through the efferent arteriole. While, in the Glomerular, the liquid fraction of blood seeps through small pores which are located on the walls of blood vessels in the Glomerular, and passing the capsule of Bowman (Bruce, 2004, pp. 455-457).

After passing the proximal tubule, blood cells and larger molecules, like proteins are not filtered (Kloet, Joels, Holsboer, 2005, pp. 463-475). Since the proximal tubule, the fluid passes into the loop of Henle, which penetrates deep into the ...
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