The period when repolarization is almost complete and the cardiac ...

[LaDunn]

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

[Missbam101]

Answer to Question 1

B

Answer to Question 2

c
Rationale: a. Morphine has agonist properties as it is a true opiate.
b. Merperedine hydrochloride binds to opiate receptors creating an agonist effect.
c. Correct.
d. Fentanyl binds with opiate receptors causing an agonist effect.

[LaDunn]

Thank you

[Missbam101]

Happy to help you