Answer: Micturition.
- A Osmoregulation
- B Micturition
- C Ultrafiltration
- D Filtration
Correct answer: B. Micturition
Explanation: Micturition is the process by which urine, stored in the urinary bladder, is voluntarily expelled from the body through the urethra.
Filtrate flows through four functionally distinct stages of the nephron: Bowman's capsule filters blood, the PCT reabsorbs most useful substances unconditionally, the Loop of Henle builds a concentration gradient via counter-current exchange, the DCT secretes selected substances, and the collecting duct performs the final ADH-controlled water reabsorption.
Concept context
Nitrogenous waste, kidney structure, urine formation in the nephron, and hormonal regulation of excretion.
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