6.1 PEx: Cardiovascular Physiology Lab Part 2

Part A

Delivering single shocks in succession to stimulate the frog heart _______.
    resulted in fused tetanus
    increased the height of the ventricular systole wave
    did not increase the height of the ventricular systole wave
    resulted in wave summation

Part B

The doublet that results with more frequent stimulation of the frog heart represents _______.
    an extrasystole and an extra contraction of the atria
    an extrasystole and an extra contraction of the ventricles
    an extra contraction of the atria
    an extrasystole
    an extra contraction of the ventricles

Part C

When the ventricles beat rapidly in succession, _______.
    the second peak was higher than the first
    wave summation occurred
    a doublet representing two atrial contractions followed
    a compensatory pause followed

Part D

When multiple stimuli were applied at 20 stimuli/sec, _______.
    extrasystoles were produced
    triplets representing three ventricular contractions occurred
    fused tetanus occurred
    atrial contractions completely disappeared