20 Questions
Which structure regulates the concentrations of K+ and NaCl in body fluids?
Distal tubule
What contributes to pH regulation in the renal system?
Movement of ions
Where does the collecting duct carry filtrate to?
Renal pelvis
What determines the concentration of urine in the collecting duct?
Permeability of the transport epithelium
Which structure is responsible for varying the amount of K+ secreted into the filtrate?
Distal tubule
What is the main function of the distal tubule?
Regulating pH levels
What determines the concentration of urine in the renal system?
Movement of ions
Which structure carries filtrate to the renal pelvis?
Collecting duct
What is the role of the transport epithelium in the collecting duct?
Determining urine concentration
Which structure regulates the reabsorption of NaCl from the filtrate?
Distal tubule
Where does reabsorption of ions, water, and nutrients primarily occur in the kidney?
Proximal tubule
What is actively and passively transported from the filtrate into the interstitial fluid and then capillaries?
Ions
Where does reabsorption of water continue through channels formed by aquaporin proteins?
Loop of Henle
What happens to the filtrate as it moves down the descending limb of the loop of Henle?
It becomes increasingly concentrated
Which part of the loop of Henle lacks water channels?
Ascending limb
What is able to move from the tubule into the interstitial fluid in the ascending limb of the loop of Henle?
Salt
What happens to the filtrate as it moves up to the cortex in the loop of Henle?
It becomes increasingly dilute
Where does the reabsorption of water and sodium primarily occur in the nephron?
Loop of Henle
Where does the active secretion of toxic materials into the filtrate occur?
Proximal tubule
Which part of the nephron is responsible for the final adjustments to the composition and volume of urine?
Distal tubule
Test your knowledge on the reabsorption process in the proximal tubule with this quiz. Learn about the active and passive transport of ions, water, and nutrients as molecules move from the filtrate into the interstitial fluid and capillaries.
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