Decreased preload effects include which sequence?

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Multiple Choice

Decreased preload effects include which sequence?

Explanation:
Preload is the amount of blood filling the ventricles at the end of diastole, driven by venous return. When veins dilate, their capacitance increases, so more blood pools in the venous system and less returns to the heart. That reduces preload. With lower preload, the ventricles fill less, producing a smaller end-diastolic volume and a smaller heart size. So the sequence venous dilation → decreased preload → decreased heart size fits. In contrast, venous constriction would raise venous return and preload, and venous dilation would typically increase venous capacitance but lead to decreased preload, not increased.

Preload is the amount of blood filling the ventricles at the end of diastole, driven by venous return. When veins dilate, their capacitance increases, so more blood pools in the venous system and less returns to the heart. That reduces preload. With lower preload, the ventricles fill less, producing a smaller end-diastolic volume and a smaller heart size. So the sequence venous dilation → decreased preload → decreased heart size fits. In contrast, venous constriction would raise venous return and preload, and venous dilation would typically increase venous capacitance but lead to decreased preload, not increased.

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