Asked by tatiana lopez on Jul 12, 2024
Verified
During isovolumetric contraction, the pressure in the ventricles ________.
A) falls rapidly
B) rises rapidly
C) remains constant
D) rises and then falls
E) falls and then rises
Isovolumetric Contraction
A phase of the cardiac cycle during which the ventricles contract with no change in blood volume, because all heart valves are closed.
Pressure
The force exerted by a substance per unit area on another substance or on a surface, measured in units such as Pascals.
- Understand the phases and regulation of the cardiac cycle.
Verified Answer
LS
Laxminarayan SharmaJul 14, 2024
Final Answer :
B
Explanation :
During isovolumetric contraction, the ventricles contract with no volume change, causing the pressure within the ventricles to rise rapidly. This phase occurs right after the ventricular systole begins and ends when the ventricular pressure exceeds the pressure in the arteries, leading to the opening of the aortic and pulmonary valves.
Learning Objectives
- Understand the phases and regulation of the cardiac cycle.
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