How does breathing change during exercise?
a. rate and depth decrease
b. rate and depth increase
c. rate increases and depth decreases
d. rate decreases and depth increases

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The amount of oxygen that is actually used by the body during the rest or a hand workout is determined by the heart rate, the stroke volume, and the amount of a. blood circulating in the vascular system b. oxygen removed from the vascular system c. oxygen provided to the vascular system d. blood that individual has in the body e. hemoglobin in the red blood cells