In a Healthy Subject, Running Is Usually Associated with a Decrease

question 35

Multiple Choice

In a healthy subject, running is usually associated with a decrease in the end-systolic volume of the right and left ventricles and with an increase in their stroke volume. What is the probable mechanism for this response?

• A) A decrease in catecholamine release
• B) An increase in sympathetic tone to the ventricles
• C) An increase in parasympathetic tone to the ventricles
• D) A decrease in venous return of blood to the heart
• E) An increase in pulmonary and systemic resistance

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