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Related Concept Videos

Breathing01:05

Breathing

The process of breathing, inhaling and exhaling, involves the coordinated movement of the chest wall, the lungs, and the muscles that move them. Two muscle groups with important roles in breathing are the diaphragm, located directly below the lungs, and the intercostal muscles, which lie between the ribs. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity and creating more room for the lungs to expand. When the intercostal muscles contract, the ribs...
Factors Affecting Respiration01:24

Factors Affecting Respiration

Respiration is a crucial physiological function involving exchanging oxygen (O2) and carbon dioxide (CO2) between an organism and its environment. Various factors can impact this essential process:
Respiration01:24

Respiration

Overview of the Respiratory System and Energy Production
Energy production in the human body is primarily fueled by oxidation, a process where food molecules are burned by combining with oxygen to produce carbon dioxide and water. This vital metabolic process sustains life, and is supported intricately by the respiratory system.
Structure and Function of the Respiratory System:
The respiratory system is a complex network of structures that includes the nose, oropharynx, larynx, trachea,...
Respiration and Gaseous Exchange01:20

Respiration and Gaseous Exchange

The intricate interplay between the cardiovascular and respiratory systems is crucial for efficiently transporting respiratory gases throughout the body. Let us explore the cardiovascular system's multifaceted functions, emphasizing its pivotal role in gas exchange.
Respiration involves the exchange of gases, especially oxygen (O2) and carbon dioxide (CO2), between the alveoli and body cells, a process facilitated by blood circulation. As a result, the cardiovascular system, which involves the...
Chemical Factors Affecting Respiration Centers01:31

Chemical Factors Affecting Respiration Centers

Chemical factors such as changing CO2, O2, and H+ levels in arterial blood play a critical role in influencing respiration depth and rates. These variations are detected by chemoreceptors—specialized sensors located in two primary body areas. Central chemoreceptors are found throughout the brain stem, including the ventrolateral medulla, while peripheral chemoreceptors are located in the aortic arch and carotid arteries.
CO2 has a potent influence on respiration and is strictly regulated. Under...
Physiological Control of Respiration01:23

Physiological Control of Respiration

Introduction
Breathing, a seemingly passive process, is regulated by the respiratory center in the brainstem. This center coordinates the involuntary control of respirations, which means it occurs without conscious effort, ensuring a smooth and uninterrupted pattern.
Regulation of Ventilation
The body maintains ventilation by monitoring levels of carbon dioxide (CO2), oxygen (O2), and hydrogen ion concentration (pH) in the arterial blood. Among these factors, the level of CO2 plays a crucial...

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Related Experiment Video

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Evaluation of Photosynthetic Efficiency in Photorespiratory Mutants by Chlorophyll Fluorescence Analysis
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Respiration in a changing environment.

Steven F Perry1, Elisabeth Spinelli Oliveira

  • 1Institut für Zoologie, Rheinische Friedrich-Wilhlems-Universität Bonn, Germany. perry@uni-bonn.de

Respiratory Physiology & Neurobiology
|April 13, 2010
PubMed
Summary
This summary is machine-generated.

Ancient molecular signaling pathways, including reactive oxygen species (ROS) and oxygen-dependent pathways, remain integral to life. These fundamental processes, involving hypoxia-inducible factor (HIF) and RuBisCO, are crucial for cellular functions and organismal complexity.

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Area of Science:

  • Multidisciplinary respiratory research
  • Molecular signaling
  • Evolutionary biology

Background:

  • Ancient molecular signaling pathways, including reactive oxygen species (ROS) and oxygen-dependent pathways, have been conserved since the origin of life.
  • These pathways predate photosynthesis and are still recognizable in modern organisms.
  • Ancient DNA sequences like hypoxia response elements and the pas gene family are integral to various cellular functions.

Purpose of the Study:

  • To highlight the role of ancient molecular signaling in multidisciplinary respiratory research.
  • To explore the evolutionary persistence of fundamental biological processes.
  • To underscore the significance of these pathways in both basic and applied research.

Main Methods:

  • Utilizing existing and novel models across all biological kingdoms.
  • Investigating molecular signaling pathways, including ROS and oxygen-dependent mechanisms.
  • Analyzing ancient DNA sequences and their functional roles, such as hypoxia response elements and pas genes.

Main Results:

  • Identified conserved molecular signaling processes, including ROS and oxygen-dependent pathways, present from early life.
  • Highlighted the ancient origins and maintained functions of pas genes, involved in hypoxia-inducible factor (HIF) regulation, development, and circadian rhythmicity.
  • Recognized the ancient oxygenase function of RuBisCO in regulating cellular peroxide balance.

Conclusions:

  • Ancient molecular signaling pathways remain fundamental to life, influencing complex processes in multicellular organisms.
  • The integration of these ancient elements into modern physiological processes, such as respiration, nutrition, and aging, presents exciting avenues for future research.
  • Understanding these conserved mechanisms provides insights into cellular function, development, and evolutionary adaptation.