★ The Cardiovascular System OCR A-level Quiz
What process will occur at the capillaries to increase blood flow to working muscles during exercise?
A. vasoconstriction
B. vasodilation
C. vaso-open
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Which is the correct definition of bradycardia?
A. a decrease in resting heart rate below 60 beats per minute
B. the thickening of the muscular wall of the heart so it becomes bigger and stronger
C. An increase in stroke volume and cardiac output
D. a decrease in blood pressure
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