Intercalated discs in the myocardium perform a very important function. Which of the following describes that function?
a. Absolute refractory period
b. Automaticity
c. Contractility
d. Electrical conduction
ANS: D
Cardiac fibers are separated by irregular transverse thickenings of the sarcolemma called interca-lated discs. These discs provide structural support and aid in electrical conduction between fi-bers.
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