Lung receptor

Lung receptors are specialized cells located in the lungs that are responsible for detecting changes in the respiratory system and sending signals to the brain. These receptors play a crucial role in maintaining homeostasis and ensuring the proper functioning of the respiratory system.

Etymology

The term "receptor" comes from the Latin word "recipere", which means "to receive". This is fitting, as receptors are responsible for receiving signals and transmitting them to the brain.

Types of Lung Receptors

There are two main types of lung receptors: stretch receptors and chemoreceptors.

Stretch Receptors

Stretch receptors are located in the smooth muscle of the airways and are sensitive to the degree of stretch or distension in the lungs. When the lungs are inflated, these receptors send signals to the brain to inhibit further inhalation, preventing overinflation of the lungs.

Chemoreceptors

Chemoreceptors are located in the carotid bodies and the aortic bodies. They are sensitive to changes in the levels of oxygen (O2), carbon dioxide (CO2), and hydrogen ions (H+) in the blood. When these levels change, chemoreceptors send signals to the brain to adjust the rate and depth of breathing.

Related Terms

• Respiratory system
• Homeostasis
• Carotid bodies
• Aortic bodies

See Also

• Pulmonary stretch receptors
• Central chemoreceptors
• Peripheral chemoreceptors