4-14 Lecture Outline

4-14 Lecture Outline - Section 44.4 covers the process...

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Lecture outline, Biology 152, 14 April 2010 Osmoregulation and Excretion 1. We ll start with a look at general issues of animal osmoregulation, including the concepts: Diffusion Osmosis Hypertonic, hypotonic, and isotonic Osmolarity, osmoconformers, and osmoregulators Consider the different challenges of osmoregulation in marine and freshwater environments. 2. Nitrogenous wastes are intricately tied to water balance and osmoregulation. Three major types (ammonia, urea, and uric acid) differ greatly in their toxicity, energy requirements, and water requirements. 3. Excretory systems We will focus on the mammal excretory system, using the human as a model.
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Unformatted text preview: Section 44.4 covers the process going from blood filtrate to urine. It is a rather complex system and comprehension, rather than memorization, may be the best way to learn it. Figures 44.15 and 44.16 are good summaries and we will dwell on them for a while in class. Know what happens in each section of the nephron and collecting duct. Give section 44.5 (hormonal control) a read, but we probably won ’ t spend much time on it, the previous section is more important for understanding kidney function and the excretory system....
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