<unk>  are mechanoreceptors found in the lungs.
When the lung expands, the<unk>  imitate the Hering-Breuer reflex, which reduces the respiratory rate.  Increased firing from the<unk><unk>  also increases production of<unk>  surfactant.
Pulmonary stretch receptors
Central chemoreceptors
Electrical conduction system of the heart
Parasympathetic nervous system
Sympathetic nervous system
Muscles of larynx
Ventricular outflow tract
Autonomic nervous system