Human Physiology - Excretory Products

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Q1. What is the main nitrogenous waste product in reptiles and birds? (2022)

Solution:

Reptiles and birds primarily excrete uric acid, which is less toxic and conserves water.

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Q2. Which part of the nephron is responsible for the majority of nutrient reabsorption? (2023)

Solution:

The proximal convoluted tubule is responsible for the majority of nutrient reabsorption, including glucose, amino acids, and ions.

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Q3. What is the primary excretory product of humans? (2021)

Solution:

Urea is the primary nitrogenous waste product excreted by humans, formed in the liver from ammonia and carbon dioxide.

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Q4. What is the normal pH range of human urine? (2022)

Solution:

The normal pH range of human urine is typically between 6.0 and 7.0, indicating it is slightly acidic.

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Q5. Which part of the nephron is responsible for the majority of reabsorption? (2023)

Solution:

The proximal convoluted tubule is responsible for the majority of reabsorption of water, ions, and nutrients.

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Q6. What is the main nitrogenous waste product in birds and reptiles? (2022)

Solution:

Birds and reptiles primarily excrete uric acid, which is less toxic and conserves water compared to urea.

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Q7. What is the primary function of the renal pelvis? (2022)

Solution:

The renal pelvis collects urine from the collecting ducts and transports it to the ureter.

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Q8. What is the effect of high protein intake on urea production? (2022)

Solution:

High protein intake increases the production of urea as more amino acids are metabolized.

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Q9. Which of the following substances is NOT typically found in urine? (2022)

Solution:

Glucose is not typically found in urine unless there is a condition such as diabetes mellitus.

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Q10. Which of the following conditions can lead to the presence of protein in urine? (2023)

Solution:

All of the above conditions can lead to proteinuria, which is the presence of protein in urine, indicating possible kidney issues.