Explain the Mechanism of Urine Formation Mechanism of Urine Formation It has four steps – ultra filtration, selective reabsorption, secretion and concentration. (i) Ultra Filtration. Blood flows inside glomerulus under pressure due to narrowness of efferent arteriole. As a result it undergoes pressure filtration or ultrafiltration. All small volume solutes (e.g., urea, uric acid, amino […]
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