Gap junctions Are present in cardiac muscles to transmit impulse from one to another myocyte

Gap junctions?
a) Are absent in cardiac muscles
b) Are absent in smooth muscles
c) Are present in cardiac muscles to transmit impulse from one to
another myocyte
d) Are present in cardiac muscles but no role
Correct Answer - C
Ans. C. Are present in cardiac muscles to transmit impulse
from one to another myocyte
Gap junctions
They are intercellular connections calledhemichannels or
connexons.
They are made up of protein subunits “Connexins”.
These continuous channel (connexons) permits substances (ions
and other) to pass from one cell to other without having to pass
through the cell membrane.
Gap junction is typically seen in cardiac and smooth muscles.
Because of gap junctions cardiac muscle behaves as a functional
syncytium as these gap junctions provide low-resistance Bridge for
spread of excitation from one fiber to other