72. Describe the two features molecules by them.(tabular res pertaining to the p

Question

72. Describe the two features molecules by them.(tabular res pertaining to the peritubular capillaries that facilitate reabsorption of / vaaksophon 73. What t approximate percentage of filtrate produces is reabsorbed by the proximal convoluted tubule (PCT)? What structural features of these cells facilitate this large amount of reabsorption? 74. Describe the three transport mechanisms for sodium ions being reabsorbed by the PCT 75, What approximate percentage of nutrients (such as glucose and amino acids) in the tubular fluid is reabsorbed by the PCT? Describe the transport mechanism for each of the two nutrient types listed above 76. How much water is reabsorbed by the PCT each day? 77. Describe any reabsorption that occurs along the nephron loop. Be sure to specify any structural differences in the cells of the loop along the different portions of the loop, and how this affects reabsorption. 19

Explanation / Answer

72) two features are:

75) approximate percentage absorbed is almost 100% of glucose and amino acids

Reabsorption of glucose:

Reabsorption of amino acids:

77)descending limb of loop oh Henle is thin due to thin cells of squamous epithelium and has low permeability to water.

Thin ascending limb of loop of Henle is impermeable to water but permeable to ions..

Cortical thick ascending limb has thick cells and hence it drains urine into DCT.

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