Control of Respiratory Rate

Control of Respiratory Rate - Control of Respiratory Rate...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Control of Respiratory Rate Neural Control of Respiration Normal breathing depends on repetitive stimuli from the brain. Neurons in the medulla oblongata and pons control unconscious breathing; inspiratory neurons fire during inspiration while expiratory neurons fire during forced expiration (recall that passive expiration is the result of the elasticity of the lungs and relaxation of the inspiratory muscles). Neurons in the motor cortex control voluntary breathing Respiratory Rhythm Chemical Control Respiratory rhythm is primarily determined by the chemistry of the blood. Chemoreceptors monitor the pH, P CO2 , P O2 of the body fluids . Peripheral chemoreceptors found in the aortic arch and carotid sinus communicate with the medulla oblongata about the chemistry of the blood while centrally located chemoreceptors located on the surface of the medulla oblongata monitor the chemistry of CSF (see Figure 8 ). Figure 8
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

Control of Respiratory Rate - Control of Respiratory Rate...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online