36 Questions
What is the initial response of cardiac output during light to moderate submaximal aerobic exercise?
Increases to a plateau
What determines the actual magnitude of each variable's change during light to moderate submaximal aerobic exercise?
Work rate or load, environmental conditions, and individual's genetic makeup and fitness level
What is steady-state exercise?
Exercise that is performed at a constant intensity
What causes an initial increase in both stroke volume and heart rate during light to moderate submaximal aerobic exercise?
Venous return
What is the Frank-Starling Law of the Heart?
The law that describes the relationship between end-diastolic volume and stroke volume
What enhances the contractility of the myocardium during light to moderate submaximal aerobic exercise?
Sympathetic nervous system
What is the initial response of systolic blood pressure during light to moderate submaximal aerobic exercise?
Increases to a plateau
Why does systolic blood pressure increase during light to moderate submaximal aerobic exercise?
Due to increased cardiac output
What happens to diastolic blood pressure during light to moderate submaximal aerobic exercise?
Remains constant
What is the main reason for the small rise in mean arterial pressure during light to moderate submaximal aerobic exercise?
Increased cardiac output
What is the main reason for the increase in stroke volume during light to moderate submaximal aerobic exercise?
Venous return
What is the main reason for the initial increase in heart rate during light to moderate submaximal aerobic exercise?
Parasympathetic withdrawal
What is the initial response of cardiac output during light to moderate submaximal aerobic exercise?
Increases to a plateau
What determines the actual magnitude of each variable's change during light to moderate submaximal aerobic exercise?
Work rate or load, environmental conditions, and individual's genetic makeup and fitness level
What is steady-state exercise?
Exercise that is performed at a constant intensity
What causes an initial increase in both stroke volume and heart rate during light to moderate submaximal aerobic exercise?
Venous return
What is the Frank-Starling Law of the Heart?
The law that describes the relationship between end-diastolic volume and stroke volume
What enhances the contractility of the myocardium during light to moderate submaximal aerobic exercise?
Sympathetic nervous system
What is the initial response of systolic blood pressure during light to moderate submaximal aerobic exercise?
Increases to a plateau
Why does systolic blood pressure increase during light to moderate submaximal aerobic exercise?
Due to increased cardiac output
What happens to diastolic blood pressure during light to moderate submaximal aerobic exercise?
Remains constant
What is the main reason for the small rise in mean arterial pressure during light to moderate submaximal aerobic exercise?
Increased cardiac output
What is the main reason for the increase in stroke volume during light to moderate submaximal aerobic exercise?
Venous return
What is the main reason for the initial increase in heart rate during light to moderate submaximal aerobic exercise?
Parasympathetic withdrawal
During light to moderate dynamic exercise, what causes the rapid increase in stroke volume (SV)?
Increased preload due to an increase in venous return
What is the initial cause of the increase in heart rate (HR) during light to moderate submaximal aerobic exercise?
Parasympathetic withdrawal
What is the Frank-Starling Law of the Heart?
The increased preload stretches the myocardium and causes it to contract more forcibly
What is steady-state exercise?
Energy provided aerobically is balanced with the energy required to perform the exercise
What causes the increase in cardiac output (Q) during light to moderate submaximal aerobic exercise?
Initial increase in both stroke volume (SV) and heart rate (HR)
What happens to cardiac output (Q) after it reaches a plateau during light to moderate submaximal aerobic exercise?
Remains constant
What is the role of the sympathetic nervous system during light to moderate submaximal aerobic exercise?
Enhances contractility of the myocardium
What happens to diastolic blood pressure (DBP) during light to moderate submaximal aerobic exercise when measured intra-arterially?
Does not change
What happens to diastolic blood pressure (DBP) during light to moderate submaximal aerobic exercise when measured by auscultation?
Either does not change or may go down slightly
What happens to systolic blood pressure (SBP) during light to moderate submaximal aerobic exercise?
Rises in a pattern very similar to that of cardiac output (Q)
What happens to mean arterial pressure (MAP) during light to moderate submaximal aerobic exercise?
Rises only slightly following the pattern of SBP
What is the relationship between environmental conditions and cardiovascular responses during light to moderate submaximal aerobic exercise?
The actual magnitude of each variable’s change depends on environmental conditions
Test your knowledge on cardiovascular responses to short-term, light to moderate submaximal aerobic exercise with this quiz. Learn about the variables that affect the magnitude of these responses and understand how work rate, environmental conditions, and fitness level impact these changes. Keywords: cardiovascular, submaximal exercise, work rate, fitness level.
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