Role of Kidney in Homeostasis Report

Running head: ROLE OF KIDNEY IN HOMEOSTASIS
ROLE OF KIDNEY IN HOMEOSTASIS
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1ROLE OF KIDNEY IN HOMEOSTASIS
PART 1
Kidney is the organ that is focused on the homeostasis maintenance of the body through
the excretion of the unwanted products of the body. In this context, it can be found that the urine
creation is the basic work process of kidney. The urination process can be found to be dependent
on three distinct methods such as the ultra filtration, selective reabsorption and secretion. The
processes of the urination will be described in details in the following section:
a) Ultra filtration
The ultra filtration process is the first point or the starting point of the urination.
Nephrons of both the kidneys contain glomerulus the site of the blood filtration. It has been seen
that the glomerulus is developed with numerous blood capillaries which are entering point of the
blood from the blood vessels of the body. The entering diameter of the capillaries has been seen
to be bigger. Now, the cup like structure of the Bowman’s capsule is the section of the nephrons
which envelopes the glomerulus and the blood vessels which transport the blood to the
Bowman’s capsule found to be with constricted diameter. Thus, the pressure of the Bowman’s
capsule area and the constricted blood vessels of glomerulus push the water and solutes through
a filtration membrane (Kira 2017). The filtration membrane restricts the blood cells and the large
molecules of proteins and ions and sends them back to the blood stream and allows the small
molecules of solutes and water to pass which develops the urine. This is the ultra filtration
process which effectively filters the blood and the fluid content of the body in the nephrons.
b) Selective reabsorption
After the ultra filtration the small solute and the water flows through the renal tubule
which is the next part of the nephrons. The renal tubule is differentiated in four sectors which are
proximal convoluted tubule, loop of Henle, thick ascending limb and distal convoluted tubule.