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QCHP Medical Licensing Exam Cardiac Cycle and Output — practice questions

Explore 18 free Cardiac Cycle and Output questions in QCHP Medical Licensing Exam Physiology. Open each question or exercise to read its content, reference answers and available explanation.

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Cardiac Cycle and Output questions and exercises with answers

Showing questions 1–18 of 18.

How much blood does a resting adult's ventricle hold at the end of atrial systole?Read the answer and worked solution →What is the volume of blood in the ventricle at the end of atrial systole called?Read the answer and worked solution →During which phase does ventricular volume stay constant while pressure climbs?Read the answer and worked solution →What normal range does stroke volume fall into?Read the answer and worked solution →After contraction, how much blood normally remains in the ventricle?Read the answer and worked solution →Which equation gives cardiac output?Read the answer and worked solution →How is stroke volume calculated from echocardiogram measurements?Read the answer and worked solution →Which principle links ventricular stretch to the force of contraction?Read the answer and worked solution →Roughly how long does ventricular systole last in total?Read the answer and worked solution →Roughly how long does ventricular diastole last?Read the answer and worked solution →What produces the dicrotic notch seen on a blood pressure tracing?Read the answer and worked solution →What closes the tricuspid and mitral valves early in ventricular systole?Read the answer and worked solution →Why does the left ventricle generate a higher pressure than the right during ejection?Read the answer and worked solution →Roughly how long does atrial systole last?Read the answer and worked solution →What is the mean stroke volume for a resting 70 kg individual?Read the answer and worked solution →Cardiac cycle bingoRead the answer and worked solution →Order the cardiac cycleRead the answer and worked solution →Key in the cardiac numbersRead the answer and worked solution →

Worked practice questions

How much blood does a resting adult's ventricle hold at the end of atrial systole?

  1. About 130 mL
  2. About 70 mL
  3. About 200 mL
  4. About 250 mL
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Correct answer: A. About 130 mL

1. Atrial systole tops up the ventricles just before they contract. 2. At that point the ventricles contain approximately 130 mL of blood in a resting adult standing up. 3. This volume is named the end diastolic volume, or preload. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 19 "The Cardiovascular System: The Heart", section 19.3 | Cardiac Cycle_

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What is the volume of blood in the ventricle at the end of atrial systole called?

  1. The stroke volume
  2. The cardiac output
  3. End diastolic volume
  4. End systolic volume
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Correct answer: C. End diastolic volume

1. Filling ends when atrial systole finishes, just before ventricular contraction. 2. That volume is known as the end diastolic volume, also called preload. 3. End systolic volume is the leftover after ejection, a different point in the cycle. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 19 "The Cardiovascular System: The Heart", section 19.3 | Cardiac Cycle_

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During which phase does ventricular volume stay constant while pressure climbs?

  1. Ventricular ejection
  2. Isovolumic contraction
  3. Atrial systole phase
  4. Ventricular filling
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Correct answer: B. Isovolumic contraction

1. Early in ventricular systole, pressure rises but is not yet high enough to open the semilunar valves. 2. Blood is therefore not ejected and the chamber volume remains constant. 3. This initial phase of ventricular systole is known as isovolumic contraction. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 19 "The Cardiovascular System: The Heart", section 19.3 | Cardiac Cycle_

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