Apatient comes into the clinic with a resting heart rate of 80 beats per minute (bpm). the patient's cardiac output was found to be 5.6 liters/minute with an ejection fraction (ef) of 70%. what is the patient's end-systolic volume (esv in ml)?
a) 30 ml
b)70 ml
c)80 ml
under an electron microscope, the different sarcomere bands of striated muscle can be visualized (i-band, a-band, h-band, and z-disk) in the relaxed state, after passive stretch, and after contraction. which sequence of manipulations will lead to increasing a-band width?
a) passive stretch, contracted, relaxed
b)passive stretch, relaxed, contracted
c) none of the above