Normal blood pressure is 120/80. What is the top number called and what is happening in the heart?

A. diastolic pressure; ventricles are relaxing
B. systolic pressure; ejection of blood from the heart
C. diastolic pressure; atria are contracting, ventricles are relaxing
D. diastolic pressure; ejection of blood from the heart
E. systolic pressure; ventricles are relaxing


Answer: B

Biology & Microbiology

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