Concept:The urinary tubule is a kidney tubule that helps to reabsorb useful substances and maintain fluid balance.
Explanation:The urinary tubule receives the filtrate after blood filtration has occurred in the glomerulus.
It selectively reabsorbs water, ions, glucose, and other useful materials into the blood.
It also secretes some waste substances into the filtrate.
Hormones such as ADH and aldosterone influence these processes.
By adjusting reabsorption, the tubule regulates the water and electrolyte balance of the body.
The tubule is not the site where blood filtration takes place.
It does not connect the kidneys to the bladder; the ureter performs that function.
Urine is formed by the coordinated activity of the nephron, not by the tubule alone.
Answer:B. The urinary tubule regulates the water and electrolyte balance in the body.