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Nephromegaly is the process whereby a kidney or both kidneys become enlarged. [1] Both autosomal dominant and autosomal recessive polycystic kidney disease can cause nephromegaly. [ citation needed ]
Size of a normal pig kidney (left) compared to a solitary pig kidney (right). Compensatory growth is a type of regenerative growth that can take place in a number of human organs after the organs are either damaged, removed, or cease to function. [1] Additionally, increased functional demand can also stimulate this growth in tissues and organs. [2]
Abnormal kidney function may cause too much or too little urine to be produced. The ability of the kidneys to filter protein is often measured, as urine albumin or urine protein levels, [2] measured either at a single instance or, because of variation throughout the day, as 24-hour urine tests. [citation needed]
This illustration demonstrates the normal kidney physiology, including the Proximal Convoluted Tubule (PCT), Loop of Henle, and Distal Convoluted Tubule (DCT). It also includes illustrations showing where some types of diuretics act, and what they do. Renal physiology (Latin renes, "kidneys") is the study of the physiology of the kidney.
The collecting duct system is the final component of the kidney to influence the body's electrolyte and fluid balance. In humans, the system accounts for 4–5% of the kidney's reabsorption of sodium and 5% of the kidney's reabsorption of water. At times of extreme dehydration, over 24% of the filtered water may be reabsorbed in the collecting ...
Micrograph of proteinaceous material in Bowman's space, which is unspecific. It is present in about 5% of people aged over 60 years, [2] but also in for example hypertensive kidney disease. Measuring the glomerular filtration rate (GFR) is a diagnostic test of kidney function. [3] A decreased GFR may be a sign of kidney failure. [citation needed]
Organomegaly is the abnormal enlargement of organs. For example, cardiomegaly is enlargement of the heart. Visceromegaly is the enlargement of abdominal organs. [1] Examples of visceromegaly are enlarged liver (hepatomegaly), spleen (splenomegaly), stomach, kidneys, and pancreas.
The kidneys of reptiles consist of a number of lobules arranged in a broadly linear pattern. Each lobule contains a single branch of the ureter in its centre, into which the collecting ducts empty. Reptiles have relatively few nephrons compared with other amniotes of a similar size, possibly because of their lower metabolic rate. [47]