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Biology
Excretory Products and their Elimination
60 questions from 34 papers, each with its answer.
- 60 questions
- 34 papers
- 1.7% of Biology
Permeability of Loop of Henle and PCT Histology
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Given below are two statements: Statements I: In the nephron the descending limb of loop of Henle is impermeable to water and permeable to electrolytes. Statement II: The proximal convoluted tubule is lined by simple columnar brush border epithelium and increases the surface area for reabsorption. In the light of the above statements, choose the correct answer from the options given below:Statement I is false: the descending limb of the loop of Henle is permeable to water but almost impermeable to electrolytes. Statement II is false: the PCT is lined by simple cuboidal brush border epithelium (not columnar), which increases the surface area for reabsorption. So both statements are false.
Juxtamedullary Nephrons
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Choose the correct statement given below regarding juxta medullary nephron.In juxtamedullary nephrons, the loop of Henle is very long and runs deep into the medulla – correct. Juxtamedullary nephrons are fewer in number than cortical nephrons, they are not located in the columns of Bertini, and their renal corpuscles lie in the inner cortical region (not in the medulla).
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