Biology Practice: Excretion in Humans (Mock Test 4 - Expert)
1. In an experimental setup, a patient's blood is found to have high levels of creatinine and urea. Which diagnostic tool would best help visualize the structural integrity of the kidneys?
2. Clinical Logic: A patient presents with blood in the urine (Hematuria) and sharp pain in the lower back. What is the most likely expert diagnosis?
3. Why is the dialyzing fluid in a dialysis machine kept at the same osmotic pressure as normal blood, but with zero nitrogenous waste?
4. Data-based: If the volume of Glomerular Filtrate is 180 liters/day, but the urine output is only 1.5 liters/day, what percentage of filtrate is reabsorbed?
5. Experimental Observation: In a microscope slide of the Renal Cortex, you see many circular, grain-like structures. These are likely:
6. A patient has a condition where the pituitary gland fails to release the "water-retaining hormone". What is the expected clinical symptom?
7. Why is the "Efferent Arteriole" narrower than the "Afferent Arteriole"?
8. Expert Logic: If a person is stranded at sea, why is drinking salt water fatal for the kidneys?
9. Which part of the kidney is most susceptible to damage from long-term untreated high blood pressure?
10. In a "Urine Analysis" report, the presence of 'Albumin' (a protein) indicates:
11. Why does the "Renal Vein" contain the cleanest blood in the entire human body regarding nitrogenous waste?
12. What is the role of "Sebaceous Glands" in excretion, though minimal?
13. In the case of a "Kidney Transplant", why is it critical to match the tissue type of the donor and recipient?
14. What is the metabolic byproduct that is excreted primarily by the lungs but is also found in small amounts in the urine?
15. Why do elderly men sometimes face difficulty in micturition (urination) despite a full bladder?
16. Selective reabsorption of water is mainly controlled by which hormone?
17. Which of the following is an example of an "Internal Excretory Balance" maintained by kidneys?
18. The "Ornithine Cycle" for urea production takes place in which specific organ?
19. What makes the "Renal Cortex" appear granular under the microscope?
20. In the dialysis machine, the blood is mixed with ________ to prevent clotting during the process.
