The period when repolarization is almost complete and the cardiac cell can be stimulated to contract prematurely if the stimulus is stronger than normal is known as:
a. the absolute refractory period.
b. the relative refractory period.
c. the action potential phase.
d. the absolute depolarization.
Question 2
A narcotic analgesic that has both agonistic and antagonistic activities on opiate receptor sites is:
a. Morphine
b. Meperedine hydrochloride
c. Butorphanol tartrate (Stadol)
d. Fentanyl
