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Nitrogenous waste is at its highest concentration in (A) plasma in the renal vein - HSC - SSCE Biology - Question 12 - 2012 - Paper 1
Question 12
Nitrogenous waste is at its highest concentration in (A) plasma in the renal vein. (B) plasma in the renal artery. (C) fluid in the collecting ducts of the kidney... show full transcript
Worked Solution & Example Answer:Nitrogenous waste is at its highest concentration in (A) plasma in the renal vein - HSC - SSCE Biology - Question 12 - 2012 - Paper 1
Step 1
Identify the highest concentration of nitrogenous waste
Answer
Nitrogenous waste products, primarily urea, are produced during protein metabolism. After filtration in the kidneys, these waste products will have varying concentrations in different compartments related to their transport and elimination.
Step 2
Analyze each option
Answer
(A) Plasma in the renal vein would have lower concentrations of nitrogenous waste compared to the renal artery due to the filtration process.
(B) Plasma in the renal artery carries blood from the heart to the kidneys, containing higher levels of nitrogenous waste before filtration.
(C) Fluid in the collecting ducts of the kidney would likely show higher concentrations of nitrogenous waste as this is where reabsorption and final adjustments occur before urine formation. This is the correct answer as the collecting ducts are the last site where urine can concentrate.
(D) Interstitial fluid in the cortex of the kidney could contain waste but is generally not the primary location for the highest concentration of nitrogenous waste.
Step 3