What is ultrafiltration? How does it occur?
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Answer:
In renal physiology, ultrafiltration occurs at the barrier between the blood and the filtrate in the glomerular capsule (Bowman's capsule) in the kidneys. As in nonbiological examples of ultrafiltration, pressure (in this case blood pressure) and concentration gradients lead to a separation through a semipermeable membrane (provided by the podocytes). The Bowman's capsule contains a dense capillary network called the glomerulus. Blood flows into these capillaries through the afferent arterioles and leaves through the efferent arterioles.
In renal physiography, ultrafiltration occurs at the barrier between the blood and the filtrate in the glomerular capsule (Bowman capsule)in the kidney. Blood flow into these capillaries through the afferent arterioles and leaves through the efferent arterioles.