What is the stepwise mechanism of urine formation in the nephron?

Ultrafiltration: removal of urea, uric acid, proteins, water, ions from blood; Tubular reabsorption: reuptake of amino acids, glucose, water, some ions; Tubular secretion: elimination of drug remains, H⁺, K⁺, creatinine, uric acid; Final urine: urea, uric acid, water, drug remains, creatinine, some ions.