Living At High Altitude With Asthma
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Handling Asthma
This book explores asthma and how people diagnosed with the disease manage it. It examines how asthma affects daily life, work, and school, and it explains the latest treatments available. Features include a glossary, web resources, source notes, and an index. Aligned to Common Core Standards and correlated to state standards. Essential Library is an imprint of Abdo Publishing, a division of ABDO.
Physiological and Pathological Responses to Hypoxia and High Altitude
Author: Rodrigo Iturriaga
language: en
Publisher: Frontiers Media SA
Release Date: 2020-06-22
The appearance of photosynthetic organisms about 3 billion years ago increased the partial pressure of oxygen (PO2) in the atmosphere and enabled the evolution of organisms that use glucose and oxygen to produce ATP by oxidative phosphorylation. Hypoxia is commonly defined as the reduced availability of oxygen in the tissues produced by different causes, which include reduction of atmospheric PO2 as in high altitude, and secondary to pathological conditions such as sleep breathing and pulmonary disorders, anemia, and cardiovascular alterations leading to inadequate transport, delivery, and exchange of oxygen between capillaries and cells. Nowadays, it has been shown that hypoxia plays an important role in the genesis of several human pathologies including cardiovascular, renal, myocardial and cerebral diseases in fetal, young and adult life. Several mechanisms have evolved to maintain oxygen homeostasis. Certainly, all cells respond and adapt to hypoxia, but only a few of them can detect hypoxia and initiate a cascade of signals intended to produce a functional systemic response. In mammals, oxygen detection mechanisms have been extensively studied in erythropoietin-producing cells, chromaffin cells, bulbar and cortical neurons, pulmonary neuroepithelial cells, smooth muscle cells of pulmonary arteries, and chemoreceptor cells. While the precise mechanism underpinning oxygen, sensing is not completely known several molecular entities have been proposed as possible oxygen sensors (i.e. Hem proteins, ion channels, NADPH oxidase, mitochondrial cytochrome oxidase). Remarkably, cellular adaptation to hypoxia is mediated by the master oxygen-sensitive transcription factor, hypoxia-inducible factor-1, which can induce up-regulation of different genes to cope the cellular effects related to a decrease in oxygen levels. Short-term responses to hypoxia included mainly chemoreceptor-mediated reflex ventilatory and hemodynamic adaptations to manage the low oxygen concentration while more prolonged exposures to hypoxia can elicit more sustained physiological responses including switch from aerobic to anaerobic metabolism, vascularization, and enhancement of blood O2 carrying capacity. The focus of this research topic is to provide an up-to-date vision on the current knowledge on oxygen sensing mechanism, physiological responses to acute or chronic hypoxia and cellular/tissue/organ adaptations to hypoxic environment.
Harper's Practical Genetic Counselling, Eighth Edition
Easy to use, and useful when kept close at hand in the room where you work. The book is a pleasure to read: the style elegant and authoritative.' Lancet '...this book is a wonderful reference to enable primary physicians to be informed about their patients.' Annals of Internal Medicine Universally used across the world by genetic counsellors, medical geneticists and clinicians alike, Harper's Practical Genetic Counselling has established itself as the essential guide to counselling those at risk from inherited disorders. Increasingly, common disorders are known to have a genetic component and this book provides invaluable and up to date guidance through the profusion of new information in this area and the associated psychosocial and ethical considerations and concerns. Within its established, tried and trusted framework, the book contains new chapters on: laboratory methods, new genetic sequencing techniques and the applications of genome-wide SNP association studies, genetic susceptibility, cross cultural aspects and the genetic counselling process. It has expand chapters on genetic screening and screening of newborn, treatment techniques and rational approaches to treatment, non-Mendelian inheritance, free fetal DNA in prenatal screening and diagnosis. Key features: - Fully updated to provide the very latest information when in a busy consulting room or clinic - Clear and authoritative advice applicable to everyday clinical practice - Reflects the rapid development of knowledge in this area, including the implications of the human genome project and related technology The eighth edition of this popular, best selling text continues to be an essential source of reference for trainee and practitioner genetic counsellors, medical geneticists and clinicians. Also it provides valuable background for specialist nurses, counsellors, social scientists, ethicists as well as genetics laboratory staff.