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Related Concept Videos

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...
Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
Regulation of the Cardiovascular System01:27

Regulation of the Cardiovascular System

The regulation of the cardiovascular system allows the body to adapt to various demands and maintain homeostasis.
The regulation of the cardiovascular system involves the autonomic nervous system (ANS), baroreceptors, and chemoreceptors, ensuring that heart rate and blood pressure are appropriately modulated in response to varying physiological demands.
The ANS comprises two main divisions: the sympathetic and parasympathetic nervous systems. The sympathetic nervous system enhances...
Physiology of Respiration II: Neurogenic Control of Respiration01:22

Physiology of Respiration II: Neurogenic Control of Respiration

The neurogenic control of respiration coordinates various neural networks and pathways to regulate breathing rate and depth, meeting the body's oxygen and carbon dioxide exchange requirements. This system adapts to physiological and environmental conditions, ensuring optimal breathing patterns.
Central Control
The brainstem is the primary site of central control, hosting respiratory centers:
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...
Introduction to Sensory Receptors01:31

Introduction to Sensory Receptors

Sensory receptors are vital in our ability to perceive and interpret the world. Sensory receptors are specialized cells in the peripheral nervous system that respond to various stimuli and enable one to experience different sensations. Based on specific criteria, sensory receptors are classified into distinct types.
The first classification criterion is based on cell type, position, and function. Some receptor cells are neurons with free nerve endings, where their dendrites are embedded in the...

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Method for Efficient Refolding and Purification of Chemoreceptor Ligand Binding Domain
14:25

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Published on: December 12, 2017

Central chemoreceptors: locations and functions.

Eugene Nattie1, Aihua Li

  • 1Dartmouth Medical School, Department of Physiology, Lebanon, New Hampshire, USA. eugene.e.nattie.jr@dartmouth.edu

Comprehensive Physiology
|June 4, 2013
PubMed
Summary
This summary is machine-generated.

Central chemoreception, vital for regulating breathing and blood gases, involves multiple brain sites beyond the medulla. It integrates signals for ventilation, blood flow, and acid-base balance, influencing various physiological functions.

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Area of Science:

  • Physiology
  • Neuroscience
  • Respiratory Regulation

Background:

  • Central chemoreception traditionally linked to CO2/H(+) detection in the brain.
  • Growing interest since 1986, with initial localization to the ventral medullary surface.
  • Recent identification of specific neurons as potential chemoreceptor cells.

Purpose of the Study:

  • To review and synthesize current understanding of central chemoreception.
  • To explore the diverse sites and functions of central chemoreception.
  • To discuss the physiological and evolutionary significance of central chemoreception.

Main Methods:

  • Literature review and synthesis of existing research.
  • Analysis of evidence for multiple chemosensory sites.
  • Integration of physiological and evolutionary perspectives.

Main Results:

  • Central chemoreception involves numerous brain sites, not solely the ventral medulla.
  • It senses brain interstitial fluid H(+) to regulate alveolar ventilation (arterial PCO2), brain blood flow, and acid-base balance.
  • Central chemoreception influences breathing, blood pressure, and arousal, providing a tonic drive for eupneic breathing.

Conclusions:

  • Central chemoreception is a complex system with distributed sites and multifaceted functions.
  • It plays a critical role in maintaining homeostasis, adapting to physiological challenges, and supporting evolutionary adaptations.
  • Understanding central chemoreception is crucial for respiratory and acid-base regulation across different life stages and conditions.