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Planarian Regeneration

Author : H. V. Brøndsted
ISBN : 9781483186290
Genre : Science
File Size : 60.26 MB
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Planarian Regeneration deals with regeneration problems including embryogenesis and morphogenesis. The book compares the principles involved in the regeneration processes with those in ontogenesis from the egg. The author also reviews the works of Thomas H. Morgan and Charles M. Child which became the basis for systematic scientific investigation of regeneration. The head regenerates vigorously, with a faster rate behind the eyes, then at various levels along the longitudinal axis of the planarian body. A time-graded regeneration includes inhibitory forces and some genetic codes that determine such rate. The time-graded field has been proven by transplantation experiments; the author addresses the morphological structure to which biochemical factors or processes determine the different rate of regeneration. He notes that the nervous system conforms to these processes as shown by studies of Lender and Klein (1961). The author suggests that the study of regeneration in planarians should involve time considerations quantitatively to explain some substance, if any, from the nervous system that activates the cytoplasm of neoblasts, and then the genome. This book will prove valuable for zoologists and researchers in genetics, biochemistry or molecular biology.
Category: Science

The Pharmacology Of Synapses

Author : J. W. Phillis
ISBN : 9781483186528
Genre : Medical
File Size : 44.14 MB
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The Pharmacology of Synapses details the advancements in the understanding of synaptic pharmacology. The book examines the development in various areas of synaptic pharmacology research. The text first covers the basic concepts of synaptic pharmacology, and then proceeds to tackling the metabolism of acetylcholine. Next, the selection deals with monoamine in the central nervous system, and neuromuscular transmission in vertebrates. The text also discusses the pharmacology of autonomic ganglia. Chapters 7 and 8 detail the pharmacological studies on neurons in the brain and spinal cord. The ninth chapter deals with the neuromuscular transmission in invertebrates, while the 10th chapter deals with drugs, transmission, and molluskan neurons. The book will be of great use to researchers and practitioners of pharmacology, neurology, biological psychology, and psychiatry.
Category: Medical

An Outline Of Developmental Physiology

Author : Chr. P. Raven
ISBN : 9781483154503
Genre : Science
File Size : 89.80 MB
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An Outline of Developmental Physiology was first published in the Dutch language in 1948, while the first English edition appeared in 1954. It was meant in the first place for readers who, though interested in its subject and having some general knowledge of science, were not acquainted with more than the first elements of biology. This new edition has been brought up to date by taking into account the literature up to about the middle of 1963. The book opens with a discussion of the fusion of sperm and egg. This is followed by separate chapters that explain the series of processes that transform the initially fairly homogeneous structure of the egg into a system with a considerable degree of spatial multiplicity. This book may be used as a preliminary introduction into the field in undergraduate classes. A list of references has been added in the interest of those who might want to refer to the original publications on some special problem. Moreover, a glossary of scientific terms has been included for the benefit of those readers who are not professional biologists.
Category: Science

The First Brain

Author : On? R. Pag?n
ISBN : 9780199965052
Genre : Science
File Size : 30.80 MB
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Planarians, a class of flatworm, are extraordinary: they possess the remarkable ability to regenerate lost body parts, including complete regeneration of the nervous system. If cut into pieces, each piece of the planarian can regenerate into a complete organism. They are also unique among invertebrates in that they display addiction-like behaviors to many drugs abused by humans. Because of these distinct neurological traits, the planarian is often used as an animal model in neurological research, being used most recently for developments in neuropharmacology. The First Brain is a discussion of how planarians have been used in neuropharmacology, and what role they have played in scientific developments that have a high impact on our culture. Planarians have been the animal models for research in drug addiction, antidepressant development, and various other topics in biology, neurobiology, and even zoology. Pag?n uses these flatworms as a framework to explore the history of biological research. The book provides accessible background information on how biomedical research is impacted by evolution, and defines neurobiology and neuropharmacology in ways that are easy to understand. At the same time, Pag?n provides enough detail for the book to useful for scientists working in various subsections of biology. The planarian has played a key role in the history biological, neuropharmacological, and zoological research, and has even made appearances in a few unexpected places in popular culture. On? Pag?n explores all these roles, and shows us why the planarian truly is one of the most extraordinary and influential organisms in scientific research today.
Category: Science

The Physiology Of Insect Reproduction

Author : Franz Engelmann
ISBN : 9781483186535
Genre : Science
File Size : 63.66 MB
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The Physiology of Insect Reproduction provides a comprehensive coverage of insect reproductive system. The title details basic phenomena governing reproductive processes in insects, with the whole spectrum of an insect reproductive cycle. The text first covers insect genitalia, and proceeds to discussing sex determination. Next, the selection talks about the development of unfertilized eggs in insects. The text also deals with gonadal development, along with insect mating behavior. Chapter 7 details the factors that affect egg production and fecundity, while Chapter 8 tackles hormonal control of egg maturation. The ninth chapter covers endocrine influence on reproduction in the male insect. The next chapters discuss oviposition, heterogony, and viviparity. The last two chapters deal with functional hermaphroditism and insect societies, respectively. The book will be of great use to students and researchers in the field of entomology.
Category: Science

Stem Cells

Author : C. S. Potten
ISBN : UOM:39015004433655
Genre : Science
File Size : 58.21 MB
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Category: Science