Physiology- Cardiac Muscle Ultimate Exam
Questions and Answers with Verified
Solutions | Latest Updated 2026
Appearance of cardiac muscle striated, fibers formed branched cylinders,
connected to one another in series and in
parallel
and this network spreads in all directions
through
the heart
How are cardiac muscles joined intercalated discs where cell membranes
together? fuse and
form a combination of mechanical and
electrical
connections
What are two components of desmosomes- mechanical connections
intercalated discs? gap junctions- electrical connections that
allow
propagation of AP
The intercalated discs render the functional syncytium --> when any portion
heart muscle a _________? What of the
does network is stimulated, an impulse travels to
this mean? all of its
parts and the whole structure contracts as
a unit
, What are the two syncytiums? Atrial- walls of two atria
Ventricular- walls of two ventricles
The divison of the heart into the atria to contract a short time ahead of
separate functional syncytia allows the
what? ventricular componenets which is
important for
heart pumping
How are the atrial and ventricular fibrous tissue, NO: conducted through
syncytium separated? Is the AP specialized
conducted through this? conductive system
Contractile unit of cardiac fiber striated, sarcomeres, think filaments, thick
filaments,
accessory proteins
Thin filaments actin, tropomyosin, troponin
Thick filaments mysoin arranged tail to tail with no heads
at the M
line, pull actin toward the center
Accessory proteins help to maintain organization of thick and
thin
filaments
Questions and Answers with Verified
Solutions | Latest Updated 2026
Appearance of cardiac muscle striated, fibers formed branched cylinders,
connected to one another in series and in
parallel
and this network spreads in all directions
through
the heart
How are cardiac muscles joined intercalated discs where cell membranes
together? fuse and
form a combination of mechanical and
electrical
connections
What are two components of desmosomes- mechanical connections
intercalated discs? gap junctions- electrical connections that
allow
propagation of AP
The intercalated discs render the functional syncytium --> when any portion
heart muscle a _________? What of the
does network is stimulated, an impulse travels to
this mean? all of its
parts and the whole structure contracts as
a unit
, What are the two syncytiums? Atrial- walls of two atria
Ventricular- walls of two ventricles
The divison of the heart into the atria to contract a short time ahead of
separate functional syncytia allows the
what? ventricular componenets which is
important for
heart pumping
How are the atrial and ventricular fibrous tissue, NO: conducted through
syncytium separated? Is the AP specialized
conducted through this? conductive system
Contractile unit of cardiac fiber striated, sarcomeres, think filaments, thick
filaments,
accessory proteins
Thin filaments actin, tropomyosin, troponin
Thick filaments mysoin arranged tail to tail with no heads
at the M
line, pull actin toward the center
Accessory proteins help to maintain organization of thick and
thin
filaments
