16. Which statement best describes the role of the Bundle of HIS in the
The Bundle of HIS is responsible for the contraction of both
b. The Bundle of HIS is a collection of cardiac fibers through
which the impulse travels on its way to the Purkinje fibers.
c. The Bundle of HIS provides nervous stimulation so that the
ventricles go in a downward direction, which is necessary for proper blood flow.
The Bundle of HIS is responsible for initiating the cardiac
17. Select the effect of excessive levels of calcium in the extracellular fluid.
Spastic condition of the heart.
A decrease in the force of contraction of the heart beat.
18. Congestive heart failure is best described as __________________.
a. An acute condition in which one or more of the coronary
arteries become blocked.
b. A complete blockage of one or more of the coronary arteries which
results in damage to the cardiac muscle.
An inflammation of the membrane that lines the heart.
d. A decrease in the efficiency of the pumping of the heart which usually
leads to pulmonary edema.