Plowman, 356 - Short-Term, Light to Moderate Submaximal Aerobic Exercise
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Questions and Answers

What is the initial response of cardiac output during light to moderate submaximal aerobic exercise?

  • Remains constant
  • Increases continuously
  • Increases to a plateau (correct)
  • Decreases

    • What determines the actual magnitude of each variable's change during light to moderate submaximal aerobic exercise?

  • Only the individual's genetic makeup and fitness level
  • Only environmental conditions
  • Work rate or load, environmental conditions, and individual's genetic makeup and fitness level (correct)
  • Only the work rate or load

    • What is steady-state exercise?

  • Exercise that requires maximal effort
  • Exercise that is constantly changing
  • Exercise that is performed at a constant intensity (correct)
  • Exercise that is performed at a high intensity

    • What causes an initial increase in both stroke volume and heart rate during light to moderate submaximal aerobic exercise?

    <p>Venous return</p> Signup and view all the answers

    What is the Frank-Starling Law of the Heart?

    <p>The law that describes the relationship between end-diastolic volume and stroke volume</p> Signup and view all the answers

    What enhances the contractility of the myocardium during light to moderate submaximal aerobic exercise?

    <p>Sympathetic nervous system</p> Signup and view all the answers

    What is the initial response of systolic blood pressure during light to moderate submaximal aerobic exercise?

    <p>Increases to a plateau</p> Signup and view all the answers

    Why does systolic blood pressure increase during light to moderate submaximal aerobic exercise?

    <p>Due to increased cardiac output</p> Signup and view all the answers

    What happens to diastolic blood pressure during light to moderate submaximal aerobic exercise?

    <p>Remains constant</p> Signup and view all the answers

    What is the main reason for the small rise in mean arterial pressure during light to moderate submaximal aerobic exercise?

    <p>Increased cardiac output</p> Signup and view all the answers

    What is the main reason for the increase in stroke volume during light to moderate submaximal aerobic exercise?

    <p>Venous return</p> Signup and view all the answers

    What is the main reason for the initial increase in heart rate during light to moderate submaximal aerobic exercise?

    <p>Parasympathetic withdrawal</p> Signup and view all the answers

    What is the initial response of cardiac output during light to moderate submaximal aerobic exercise?

    <p>Increases to a plateau</p> Signup and view all the answers

    What determines the actual magnitude of each variable's change during light to moderate submaximal aerobic exercise?

    <p>Work rate or load, environmental conditions, and individual's genetic makeup and fitness level</p> Signup and view all the answers

    What is steady-state exercise?

    <p>Exercise that is performed at a constant intensity</p> Signup and view all the answers

    What causes an initial increase in both stroke volume and heart rate during light to moderate submaximal aerobic exercise?

    <p>Venous return</p> Signup and view all the answers

    What is the Frank-Starling Law of the Heart?

    <p>The law that describes the relationship between end-diastolic volume and stroke volume</p> Signup and view all the answers

    What enhances the contractility of the myocardium during light to moderate submaximal aerobic exercise?

    <p>Sympathetic nervous system</p> Signup and view all the answers

    What is the initial response of systolic blood pressure during light to moderate submaximal aerobic exercise?

    <p>Increases to a plateau</p> Signup and view all the answers

    Why does systolic blood pressure increase during light to moderate submaximal aerobic exercise?

    <p>Due to increased cardiac output</p> Signup and view all the answers

    What happens to diastolic blood pressure during light to moderate submaximal aerobic exercise?

    <p>Remains constant</p> Signup and view all the answers

    What is the main reason for the small rise in mean arterial pressure during light to moderate submaximal aerobic exercise?

    <p>Increased cardiac output</p> Signup and view all the answers

    What is the main reason for the increase in stroke volume during light to moderate submaximal aerobic exercise?

    <p>Venous return</p> Signup and view all the answers

    What is the main reason for the initial increase in heart rate during light to moderate submaximal aerobic exercise?

    <p>Parasympathetic withdrawal</p> Signup and view all the answers

    During light to moderate dynamic exercise, what causes the rapid increase in stroke volume (SV)?

    <p>Increased preload due to an increase in venous return</p> Signup and view all the answers

    What is the initial cause of the increase in heart rate (HR) during light to moderate submaximal aerobic exercise?

    <p>Parasympathetic withdrawal</p> Signup and view all the answers

    What is the Frank-Starling Law of the Heart?

    <p>The increased preload stretches the myocardium and causes it to contract more forcibly</p> Signup and view all the answers

    What is steady-state exercise?

    <p>Energy provided aerobically is balanced with the energy required to perform the exercise</p> Signup and view all the answers

    What causes the increase in cardiac output (Q) during light to moderate submaximal aerobic exercise?

    <p>Initial increase in both stroke volume (SV) and heart rate (HR)</p> Signup and view all the answers

    What happens to cardiac output (Q) after it reaches a plateau during light to moderate submaximal aerobic exercise?

    <p>Remains constant</p> Signup and view all the answers

    What is the role of the sympathetic nervous system during light to moderate submaximal aerobic exercise?

    <p>Enhances contractility of the myocardium</p> Signup and view all the answers

    What happens to diastolic blood pressure (DBP) during light to moderate submaximal aerobic exercise when measured intra-arterially?

    <p>Does not change</p> Signup and view all the answers

    What happens to diastolic blood pressure (DBP) during light to moderate submaximal aerobic exercise when measured by auscultation?

    <p>Either does not change or may go down slightly</p> Signup and view all the answers

    What happens to systolic blood pressure (SBP) during light to moderate submaximal aerobic exercise?

    <p>Rises in a pattern very similar to that of cardiac output (Q)</p> Signup and view all the answers

    What happens to mean arterial pressure (MAP) during light to moderate submaximal aerobic exercise?

    <p>Rises only slightly following the pattern of SBP</p> Signup and view all the answers

    What is the relationship between environmental conditions and cardiovascular responses during light to moderate submaximal aerobic exercise?

    <p>The actual magnitude of each variable’s change depends on environmental conditions</p> Signup and view all the answers

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