The Movement Of Molecules Across Cell Membranes

Transport and Diffusion across Cell Membranes is a comprehensive treatment of the transport and diffusion of molecules and ions across cell membranes. This book shows that the same kinetic equations (with appropriate modification) can describe all the specialized membrane transport systems: the pores, the carriers, and the two classes of pumps. The kinetic formalism is developed step by step and the features that make a system effective in carrying out its biological role are highlighted. This book is organized into six chapters and begins with an introduction to the structure and dynamics of cell membranes, followed by a discussion on how the membrane acts as a barrier to the transmembrane diffusion of molecules and ions. The following chapters focus on the role of the membrane's protein components in facilitating transmembrane diffusion of specific molecules and ions, measurements of diffusion through pores and the kinetics of diffusion, and the structure of such pores and their biological regulation. This book methodically introduces the reader to the carriers of cell membranes, the kinetics of facilitated diffusion, and cotransport systems. The primary active transport systems are considered, emphasizing the pumping of an ion (sodium, potassium, calcium, or proton) against its electrochemical gradient during the coupled progress of a chemical reaction while a conformational change of the pump enzyme takes place. This book is of interest to advanced undergraduate students, as well as to graduate students and researchers in biochemistry, physiology, pharmacology, and biophysics.

The Movement of Molecules across Cell Membranes provides an understanding of the molecular basis of the movement of substances across the cell membrane by discussing the composition and structure of cell membranes. Comprised of nine chapters, the book starts by discussing the theory of irreversible thermodynamics to membrane transport, followed by a discussion of the Eyring analysis of diffusion. It then discusses the model for movement into and across the cell membranes. Other chapters focus on the existence of pores in the red cell membranes and the ion movement across the erythrocyte membranes. The book's final chapter considers the four classifications of membrane-based models, which include the mobile carrier model, the pore model, and the two classes of enzyme models. This book is intended for research students, research workers, biochemists, biophysicists, and physiologists. Pharmacologists in the clinical field, as well as research workers in agriculture, will also find this book invaluable.

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Concepts of Biology is designed for the single-semester introduction to biology course for non-science majors, which for many students is their only college-level science course. As such, this course represents an important opportunity for students to develop the necessary knowledge, tools, and skills to make informed decisions as they continue with their lives. Rather than being mired down with facts and vocabulary, the typical non-science major student needs information presented in a way that is easy to read and understand. Even more importantly, the content should be meaningful. Students do much better when they understand why biology is relevant to their everyday lives. For these reasons, Concepts of Biology is grounded on an evolutionary basis and includes exciting features that highlight careers in the biological sciences and everyday applications of the concepts at hand.We also strive to show the interconnectedness of topics within this extremely broad discipline. In order to meet the needs of today's instructors and students, we maintain the overall organization and coverage found in most syllabi for this course. A strength of Concepts of Biology is that instructors can customize the book, adapting it to the approach that works best in their classroom. Concepts of Biology also includes an innovative art program that incorporates critical thinking and clicker questions to help students understand--and apply--key concepts.

Biology for AP® courses covers the scope and sequence requirements of a typical two-semester Advanced Placement® biology course. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. Biology for AP® Courses was designed to meet and exceed the requirements of the College Board’s AP® Biology framework while allowing significant flexibility for instructors. Each section of the book includes an introduction based on the AP® curriculum and includes rich features that engage students in scientific practice and AP® test preparation; it also highlights careers and research opportunities in biological sciences.

In this book, skilled experts provide the most up-to-date, step-by-step laboratory protocols for examining molecular machinery and biological functions of exocytosis and endocytosis in vitro and in vivo. The book is insightful to both newcomers and seasoned professionals. It offers a unique and highly practical guide to versatile laboratory tools developed to study various aspects of intracellular vesicle trafficking in simple model systems and living organisms.

The Living Barrier: A Primer on Transfer across Biological Membranes provides information pertinent to the movement of molecules across cell membranes. This book covers a variety of topics, including cell membrane, membrane transfer, water transfer, and movement of charged solutes. Organized into nine chapters, this book begins with an overview of the basic ideas of the cell membrane and reviews the experimental evidence about the structure of the cell membrane. This text then reviews the classical electron microscope pictures of membranes. Other chapters consider the interactions between electrical potentials and the movements of charged substances, which make the membrane transfer of these substances much more complicated than those of neutral molecules. This book discusses as well the aspects of water structure and its influence on membrane permeability. The final chapter deals with the methods by which membranes are synthesized. This book is a valuable resource for biochemists, physiologists, pharmacologists, and botanists.