An increase in the concentration of carbon dioxide in the blood will stimulate what to happen?
A. the muscles to work harder
B. your breathing rate to increase
C. your heart to beat faster ( sympathetic nervous system)
D. your blood pressure to increase
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Which is the correct definition of stroke volume?
A. the volume of blood returning to the heart via the veins
B. the volume of blood pumped out of the atria each minute
C. the volume of blood pumped out the ventricles in each contraction
D. the volume of blood that fills the ventricles each minute.
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