Related Experiment Videos
Chemoreceptor control of the airways
1Department of Physiology, St George's Hospital Medical School, London, U.K.
Respiration Physiology
|March 1, 1992
Summary
Peripheral chemoreceptors influence respiratory motor systems, causing bronchoconstriction and mucus secretion. These reflexes also affect airway diameter and blood flow, impacting lung ventilation and gas exchange.
Area of Science:
- Physiology
- Respiratory System
Background:
- Peripheral chemoreceptors are crucial for regulating respiration.
- Their influence extends beyond breathing to various motor systems within the respiratory tract.
Purpose of the Study:
- To investigate the diverse reflex effects of peripheral chemoreceptors on the respiratory system.
- To understand how these reflexes modulate airway caliber, mucus secretion, and vascular tone.
Main Methods:
- The study reviews existing literature on the physiological responses to peripheral chemoreceptor stimulation.
- Analysis of reflex pathways and their impact on different components of the respiratory tract.
Main Results:
- Peripheral chemoreceptor stimulation induces reflex bronchoconstriction, mucus secretion, and vasoconstriction in nasal and tracheal regions.
- Larynx and oropharynx dilation occurs, while pulmonary vasoconstriction is also observed.
- These combined effects alter airway caliber, influencing lung ventilation and blood gas tensions.
Conclusions:
- The entire respiratory tract is a significant target for reflexes originating from peripheral chemoreceptors.
- Peripheral chemoreceptors play a complex role in modulating respiratory function and airway dynamics.