- CQ Which cell type interacts with both the humoral and cell-mediated immune pathways A Plasma cells B Cytotoxic T cells C Natural killer cells D

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February 28, 2008 CQ: Which cell type interacts with both the humoral and cell-mediated immune pathways? A) Plasma cells B) Cytotoxic T cells C) Natural killer cells D) Class 1 MHC molecules E) Helper T cells Nitrogenous wastes By-products of breaking down of proteins and amino acids 1. Excreted as different chemicals depending on the habitat of the animals a. Ammonia b. Urea—what we excrete c. Uric acid 2. Ammonia a. A small and toxic molecule b. Soluble in water c. In dilute environments d. Fishes and aquatic insects 3. Urea a. Low toxicity b. Energetically expensive c. Mammals, turtles, most adult amphibians 4. Uric acid
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a. Low toxicity b. Not soluble in water i. Semi-solid paste ii. Conserve water c. Most energetically expensive d. Insects, birds, and many reptiles Human excretory System o Maintains water balance o Maintains solute balance—hydrogen which helps us maintain salt balance and a pH balance o Filters blood o Eliminates toxins o Eliminates nitrogenous wastes Basis of the excretory system
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This note was uploaded on 04/26/2009 for the course EBIO 1220 taught by Professor Demig-addams during the Spring '07 term at Colorado.

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- CQ Which cell type interacts with both the humoral and cell-mediated immune pathways A Plasma cells B Cytotoxic T cells C Natural killer cells D

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