Urine formation is the result of:
Correct answer: D. All of the above
- A. Ultrafiltration
- B. Reabsorption
- C. Tubular secretion
- D. All of the above
Explanation
Urine formation involves three main processes in the kidneys:Ultrafiltration (glomerular filtration) - blood is filtered in the glomerulus to form the initial filtrate. Reabsorption - useful substances are reclaimed from the filtrate back into the blood in the renal tubules. Tubular secretion -additional waste products are secreted into the tubules from the blood.The combination of these three processes produces urine.
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About Homeostasis
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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More Homeostasis questions
The water content of mammalian blood is regulated by antidiuretic hormone(ADH). In which part of the nephron does regulation occur ?
The active uptake of sodium in the ascending limb or thick loop of Henle is promoted by the action of:
The basic functional unit of the human kidney is:
ADH, which actively transports water from the filtrate in collecting tubules back to the kidney is released by:
Capillaries present around the loop of Henle:
The mechanism by which substances are removed from blood and are directly added to the tubular fluids is called: