Describe how lung ventilation and heart rate can be increased or decreases
Describe how lung ventilation and heart rate can be increased or decreases
- increased tissue respiration causes accumulation of carbon dioxides and depletion of oxygen
- the high carbon dioxide content in blood is detected by carotid body and aortic bodies.
- These send impulses to and stimulate the respiratory centre in medulla oblongata
- The respiratory centre send impulses to the intercostal muscle and diaphragm muscles to contract more vigorously to increase ventilation.
- When there is enough oxygen and less carbon dioxide the aortic and carotid bodies are less stimulated
- The frequency and depth of contraction of intercostal and diaphragm muscles reduce. This reduces the ventilation rate.
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CATEGORIES Bio Questions and answers
TAGS Dr. Bbosa Science