End-systolic volume is defined as the
A) amount of blood a ventricle ejects per cycle.
B) amount of blood which backflows into a ventricle.
C) amount of blood remaining in an atrium after atrial systole.
D) amount of blood remaining in a ventricle after contraction.
E) stroke volume multiplied by the heart rate.
Question 2
A normal sperm count ranges from approximately ________ sperm per milliliter.
A) 10 million
B) 100-150 million
C) 1-2 million
D) 500 million
E) 20-100 million