BI-1152
The heart
Biology · Secondary 3 · Medium · The heart
During one cardiac cycle, the pressure in the right ventricle rises from 5 mmHg to 25 mmHg, then falls again. The pressure in the pulmonary artery starts to rise shortly after the ventricle pressure rises.
Which event in the heart directly causes the pressure in the pulmonary artery to increase?
Which event in the heart directly causes the pressure in the pulmonary artery to increase?
- Relaxation of the right ventricle
- Contraction of the right ventricle
- Relaxation of the right atrium
- Contraction of the left ventricle
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