Urinalysis & Body Fluids Exam 1
Review Questions and Answers
(100% Pass)
What are the components of urine?
✓ Water (95%) and solutes (5%)
What is the major organic substance of urine?
✓ Urea
What is the major inorganic substance of urine?
✓ Chloride
What type of nephron predominates the other?
✓ Cortical
What types of substances are NOT filtered by the glomerulus?
✓ Large (>70,000MW) and negatively charged (Like albumin)
What regulates renal concentration?
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✓ The counter current mechanism and ADH(vasopressin)
What is the countercurrent mechanism?
✓ Maintains the osmotic gradient of the medullary interstitium.
How does the countercurrent mechanism work?
✓ Reabsorbs water to the blood in the DLH and reabsorbs Na+ into the
medulla in the ALH
What is NOT actively reabsorbed in the tubules?
✓ Urea in the PCT & ALH
What is NOT passively reabsorbed in the tubules?
✓ Amino acids in the PCT
What is tubular secretion?
✓ The movement substances from the blood to the ultrafiltrate
What is tubular absorption?
Master01 | October, 2024/2025 | Latest update