By Leslie H. Chappell B.Sc., Ph.D. (auth.)
THIS ebook HAS BEEN constructed FROM a brief LECTURE path GIVEN to complex undergraduate scholars as a part of a normal advent to the topic of parasitology for zoologists. The ebook is written for the undergraduate who has no earlier adventure of parasitology and little heritage in both biochemistry or body structure. it's not a protracted booklet, and scholars must seek advice the various extra designated textbooks in parasitology and body structure to achieve a whole figuring out of the themes thought of the following. My target in scripting this e-book is to introduce the breadth of parasite body structure, leaving the reader to procure a intensity of data by way of his personal library study. each one bankruptcy covers a unmarried subject or similar issues in physiological parasitology, and the variable size of the chapters displays the volume of study curiosity that has been generated over the past few a long time. it really is to be was hoping that through use of this ebook scholars will improve an curiosity in a number of the extra overlooked components and be encouraged to make sturdy a number of the extra obvious deficiencies in our present wisdom. I may still wish to recognize with gratitude the help of my colleagues Dr 1. Barrett, Dr R. A. Klein, Dr A. W. Pike and Dr R. A.
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The cycle functions both catabolically to yield ATP, and biosynthetically as a fundamental source of carbohydrates, proteins and lipids. ~ ACETYL-CoA :;;: .... LIPID citrate synthase aconitate hydratase L-~-~~--.... ----------...... :;succinate dehydrogenase I FUMARATE 1 4 h SUCCINATE 2-0xogluta~ate dehydrogenase . 3 ATP SUCCINYL-CoA NAD I NADf FADH. ~== PROTEIN ;;;: NET REACTION OFTHE CYCLE: Acetyl-CoA+3NAO· + FAO+ G OP+ P+2H 2 0 ..... 2C0 2 + CoASH+3NAOH+ FADH 2 +GTP 11 moles of ATP are produced by the TCA cycle when it leads to electron transport and oxidative phosphorylation.
G. male schistosomes store much more glycogen (14-30% of dry weight) than do female worms (3-5% of dry weight). The metabolic significance of this difference is unclear. Sexual difference in the quantities of stored glycogen is also a feature of several other parasites: Macracanthorhynchus hirudinaceus, Moniliformis dubius (Acanthocephala); Ascaris lumbricoides, Ascaridia galli, Parascaris equorum and Angiostrongylus cantonensis (Nematoda). Utilization of glycogen as an energy store can be demonstrated readily by experimental deprivation of either carbohydrate or total food of the infected host, whereupon rapid depletion of stored glycogen within the parasite occurs.
Cestodes were long thought to rely exclusively upon the digestive enzymes of their hosts to provide them with nutrient molecules in a state available for absorption, but recent 40 FEEDING AND NUTRITIONAL PHYSIOLOGY work has shown that tapeworms may possess their own digestive enzymes bound to their surface. Phospho hydrolase activity is present in the tegument of H. g. fructose 1, 6-diphosphate is hydrolysed at the surface to yield inorganic phosphate that can then be absorbed; fructose itself is unable to enter H.
Physiology of Parasites by Leslie H. Chappell B.Sc., Ph.D. (auth.)