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Questions and Answers
What type of epithelium is found in the thick ascending limb of the loop of Henle?
What type of epithelium is found in the thick ascending limb of the loop of Henle?
- Simple cuboidal epithelium (correct)
- Stratified squamous epithelium
- Simple squamous epithelium
- Transitional epithelium
Which of the following substances is NOT reabsorbed in the proximal convoluted tubule (PCT)?
Which of the following substances is NOT reabsorbed in the proximal convoluted tubule (PCT)?
- Potassium (correct)
- Glucose
- Sodium Chloride (NaCl)
- Water
What is the primary function of the thin limb of the loop of Henle?
What is the primary function of the thin limb of the loop of Henle?
- Reabsorption of glucose and amino acids
- Reabsorption of water (correct)
- Reabsorption of sodium and potassium
- Secretion of waste products
Which of the following structures is NOT part of the juxtaglomerular apparatus?
Which of the following structures is NOT part of the juxtaglomerular apparatus?
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What is the role of the collecting ducts in urine formation?
What is the role of the collecting ducts in urine formation?
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Which of the following structures is responsible for transporting urine from the kidneys to the urinary bladder?
Which of the following structures is responsible for transporting urine from the kidneys to the urinary bladder?
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Study Notes
Renal Corpuscles Filtration
- Filtration takes place in three steps: glomerular basement membrane, podocyte, and urinary space
Proximal Convoluted Tubule (PCT)
- Reabsorption of various substances occurs in the PCT, including:
- 70% of NaCl
- 98% of Glucose
- 70% of Water
- 97% of Amino Acids
Loop of Henle
- Consists of three parts: thin limb, thick ascending limb, and descending limb
- Thin limb:
- Has simple squamous epithelium that gradually changes to low cuboidal at the end
- Thick ascending limb:
- Has simple cuboidal epithelium with apical micro projections and undulating cell border
- No Brush borders
- Reabsorption of specific substances occurs, including:
- 25% of Sodium
- 25% of Calcium
- 20% of Potassium
- 55% of Magnesium
- Descending limb:
- Only water is removed
- Concentrated urine is formed in this part of the nephron
Other Components of the Urinary System
- Distal Convoluted Tubule
- Connecting Segment
- Collecting Ducts
- Juxtaglomerular Apparatus
- Ureter
- Urinary Bladder
- Urethra
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