HBS204 Lecture Notes - Lecture 3: Respiratory Center, Dorsal Respiratory Group, Peripheral Chemoreceptors
Document Summary
Hbs204 week 3 respiratory system 3 and renal system. Breathing is a rhythmic process that occurs without conscious thought or awareness (most of the time) It is initiated or controlled by the contraction of skeletal muscle which is controlled by motor neurones which receives signals from the cns. There is also sensory input to control our ventilation rate, firing can also be modulated by a response in changes levels of o2, co2 and h+ in blood and extracellular fluid. The exact neuronal pathway is poorly defined many unknowns associated: we know the regions of the brainstem involved but unclear about network that connects these regions and how they interact. Levels of control of ventilation graphical representation. The stimuli include carbon dioxide oxygen and ph levels and some emotional and voluntary control which comes through higher brain centres and the limbic system to modulate output to the respiratory muscles. Breathing is controlled by regions of the brain stem.
