lecture 4-5 renal system II

lecture 4-5 renal system II - Question: What is the most...

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Question: What is the most important function of the kidney? Waste removal is also important – but, variations in blood volume or ions will cause serious medical problems before the accumulation of wastes become toxic.
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Chapter 44 (continued) Excretory system – renal structure/function Learning objectives: • Describe the key steps in the process of urine production. • Be able to identify and give the function of each structure in the mammalian excretory system. • Describe the function of each region of the nephron. • Describe and explain the relationships among the processes of filtration, reabsorption, and secretion in the mammalian kidney.
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Transport Epithelia Transport epithelia Are specialized cells that regulate solute movement Are essential components of osmotic regulation and metabolic waste disposal Are arranged into complex tubular networks
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An example of transport epithelia is found in the salt glands of marine birds Which remove excess sodium chloride from the blood Figure 44.7a, b Nasal salt gland Nostril with salt secretions Lumen of secretory tubule NaCl Blood flow Secretory cell of transport epithelium Central duct Direction of salt movement Transport epithelium Secretory tubule Capillary Vein Artery (a) An albatross’s salt glands empty via a duct into the nostrils, and the salty solution either drips off the tip of the beak or is exhaled in a fine mist. (b) One of several thousand secretory tubules in a salt- excreting gland. Each tubule is lined by a transport epithelium surrounded by capillaries, and drains into a central duct. (c)
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This note was uploaded on 03/19/2008 for the course BIO 311D taught by Professor Reichler during the Spring '08 term at University of Texas at Austin.

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lecture 4-5 renal system II - Question: What is the most...

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