Nephron and Urine Formation: How Kidneys Filter Blood Explained
The nephron is the functional unit of the kidney responsible for filtering blood and forming urine. Through a process of filtration, reabsorption, and secr
TL;DR: The nephron is the functional unit of the kidney responsible for filtering blood and forming urine. Through a process of filtration, reabsorption, and…
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Nephron and Urine Formation: How Kidneys Filter Blood: The nephron is the functional unit of the kidney responsible for filtering blood and forming urine. Through a process of filtration, reabsorption, and secr
Nephron and Urine Formation: How Kidneys Filter Blood Explained Simply
The nephron is the functional unit of the kidney responsible for filtering blood and forming urine. Through a process of filtration, reabsorption, and secr This is a key Biology concept for 10.
Frequently Asked Questions
Why is the proximal convoluted tubule so long and twisted?
The long length and large surface area allow time and space for selective reabsorption through active transport. The twisted path slows the flow of filtrate, giving more time for reabsorption to occur.
How does antidiuretic hormone control water reabsorption?
When blood becomes concentrated, the brain releases antidiuretic hormone. This hormone increases the water permeability of the collecting duct walls, allowing more water to be reabsorbed. This produces less, more concentrated urine.
What is the function of the juxtaglomerular apparatus?
The juxtaglomerular apparatus senses blood pressure and sodium levels. It releases renin, which regulates blood pressure and sodium balance through a complex hormonal cascade.