객관식
Which part of the renal tubule is lined with cuboidal epithelial cells bordered by dense microvilli?
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25. The Urinary System
Introduction to the Urinary System
객관식
Which of the following statements about the collecting duct in the presence of antidiuretic hormone (ADH) is correct?
A
The collecting duct becomes permeable to water, allowing water reabsorption.
B
The collecting duct remains impermeable to water, preventing water reabsorption.
C
ADH has no effect on the permeability of the collecting duct.
D
ADH causes the collecting duct to secrete water into the filtrate.
검증된 단계별 안내1
Understand the role of antidiuretic hormone (ADH): ADH is a hormone secreted by the posterior pituitary gland that regulates water balance in the body by affecting the kidneys.
Focus on the collecting duct: The collecting duct is a structure in the nephron of the kidney that plays a key role in water reabsorption and urine concentration.
Learn how ADH affects the collecting duct: ADH increases the permeability of the collecting duct to water by promoting the insertion of aquaporins (water channels) into the membrane of the duct's cells.
Consider the physiological outcome: When the collecting duct becomes permeable to water due to ADH, water is reabsorbed into the bloodstream, concentrating the urine and reducing water loss.
Eliminate incorrect options: Based on the mechanism of ADH, rule out statements that suggest the collecting duct remains impermeable to water, secretes water, or is unaffected by ADH.
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