The nephron is the functional unit of the kidney responsible for filtering blood and forming urine. Through a process of filtration, reabsorption, and
syllab.in · free
❓ Quick answer
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.
❓ Quick answer
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.
❓ Quick answer
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.
Learn it fully — free
syllab.in