The book will contain reviews and brief research articles from the participants attending the International Society for Arterial Chemoreception (ISAC) meeting, to be held in Lisbon in Portugal in June/July 2020. Since ISAC was first established, almost 70 years ago, many advances in the classical field of arterial O2, CO2 and pH sensing have been achieved but the most impressive ones are probably related to the non-canonical roles of the carotid body, as its involvement in sympatho-mediated diseases. Over the recent years, the carotid body field has gained attention with the findings that carotid body dysfunction is associated with the development/maintenance of highly prevalent diseases from cardio-metabolic diseases to asthma. Knowing that most of the patients with these pathologies lack long-term disease control, it is imperative to define new pathophysiological mechanisms aiming to find new therapeutic targets for treatment and prevention. This book will cover a broad range of topics related, not only with the fundamental knowledge of the mechanisms related with the chemical sensing in the carotid body, but also with the adaptive and mal-adaptive responses of arterial chemoreceptors to O2-dependent and O2-independent mechanisms, namely with their impact on respiratory, cardiovascular, and metabolic homeostasis in healthy and disease conditions. This volume will be required text for all the researchers in the field of arterial chemoreceptors and will provide a valuable reference source for years to come.