The cardiac term that refers to the volume of blood remaining in a ventricle after contraction is
(a) end diastolic volume,
(b) end systolic volume,
(c) stroke volume,
(d) cardiac reserve.

검증된 단계별 안내

Understand the cardiac cycle phases: diastole (ventricular relaxation and filling) and systole (ventricular contraction and ejection).

Identify that 'end diastolic volume' (EDV) is the volume of blood in the ventricle at the end of diastole, just before contraction.

Recognize that 'end systolic volume' (ESV) is the volume of blood remaining in the ventricle after contraction (systole) has occurred.

Know that 'stroke volume' (SV) is the amount of blood ejected from the ventricle during systole, calculated as SV = EDV - ESV.

Understand that 'cardiac reserve' refers to the difference between resting and maximal cardiac output, not a volume of blood.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

End Systolic Volume (ESV)

End systolic volume is the amount of blood left in a ventricle after it has contracted during systole. It represents the residual blood that was not ejected into the arteries. Understanding ESV is crucial for assessing cardiac efficiency and function.

End Diastolic Volume (EDV)

End diastolic volume is the total volume of blood in a ventricle at the end of filling or diastole, just before contraction. It reflects the preload or initial stretching of the cardiac muscle fibers, influencing stroke volume and cardiac output.

Stroke Volume and Cardiac Reserve

Stroke volume is the amount of blood ejected by a ventricle during each contraction, calculated as EDV minus ESV. Cardiac reserve refers to the heart's ability to increase output during increased activity. Both concepts relate to heart performance but differ from the volume remaining after contraction.

The cardiac term that refers to the volume of blood remaining in a ventricle after contraction is (a) end diastolic volume, (b) end systolic volume, (c) stroke volume, (d) cardiac reserve.