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Nervous System Response to Blood CO2 Levels - Coggle Diagram
Nervous System Response to Blood CO2 Levels
Components:
Respiratory centre
(in medulla oblongata)
Central chemoreceptor
s (in medulla oblongata)
Sensory receptors
(in aorta, carotid arteries, and vena cava)
Effectors
(respiratory muscles - diaphragm and intercostal muscles)
Low CO2 level in the blood
Normal CO2 levels detected by central chemoreceptors in the medulla oblongata
Normal signal sent from chemoreceptors to the respiratory centre in the medulla oblongata
Respiratory centre maintains normal breathing rate and depth
Effectors (respiratory muscles - diaphragm and intercostal muscles) continue normal activity
Normal CO2 expulsion and oxygen intake maintained
Stable CO2 levels in blood preserved
Continuous feedback to chemoreceptors, maintaining the cycle
Importance:
Maintains acid-base balance
Ensures adequate oxygen supply to muscles during exercise
High CO2 level in the blood
Increased CO2 levels detected by central chemoreceptors in the medulla oblongata
Strong signal sent from chemoreceptors to the respiratory centre in the medulla oblongata
Respiratory centre stimulated to increase breathing rate and depth
Signals sent to effectors (respiratory muscles - diaphragm and intercostal muscles)
Effectors increase their activity, leading to increased breathing rate and depth
Increased CO2 expulsion and oxygen intake
CO2 levels in blood begin to decrease
Continuous feedback to chemoreceptors, adjusting the response as CO2 levels change