BMEN 548 EXAM 1 Questions with 100%
Correct Answers Latest Versions 2025 Graded
A+
what is the blood supply to the heart?
coronary
what is the venous return?
coronary sinus
why is the anterior interventricular artery so
important?
widowmaker, supplies blood to both left and right
ventricles
what are the two kinds of innervation to the heart?
sympathetic (fight or flight) and parasympathetic (rest and
digest)
how are cardiac myocytes different from other
muscles?
nuclei are centered, they have intercalated disks,
spontaneous contraction
what is an intercalated disk and where is it found?
cardiac muscle, its a complex arrangement of cells, found
at the short axis of the myocyte at the end of the cell
what is the stimulus for a cardiac myocyte to
contract?
autorhythmic spontaneously contract and cause surround
CMs to contract via intervalated disks and branching
morphology of the cells
why is cardiac troponin I a bad thing to have in your
blood work?
, it is the only truly cardio-specific gene. if you have it in
your bloodstream it left your heart due to a heart attack
what is epicardium?
blood vessels, adipose tissue, nerves, and a dense layer
of connective tissue, maybe some stem cells
what cells deposit collagen in the myocardium after
an infarction?
fibroblasts
what layer of the heart gives rise to the coronary
arteries?
epicardium
what is found in the sub-endocardium?
purkinje fibers
what are the three layers of heart valves and what are
their functions?
fibrosa (collagen), spongiosa (proteoglycan), and
atrialis/ventricularis(elastin)
what shapes the valves during development?
mechanical forces such as laminar shear stress from left
ventricle and oscillatory shear stress of sinus
what is the effect on heart valves if the mechanical
environment is altered during development?
they don't develop right - dysgenesis
during an echocardiogram, agitated normal saline is
injected into a peripheral vein. bubbles are then
observed entering the left atrium. what cardiac
structure did not fully close during development?
foramen ovale
during an ultrasound at 22 weeks, it is found that the
heart has an undivided outflow tract that sits over the
top of the left and right ventricles. what is the
Correct Answers Latest Versions 2025 Graded
A+
what is the blood supply to the heart?
coronary
what is the venous return?
coronary sinus
why is the anterior interventricular artery so
important?
widowmaker, supplies blood to both left and right
ventricles
what are the two kinds of innervation to the heart?
sympathetic (fight or flight) and parasympathetic (rest and
digest)
how are cardiac myocytes different from other
muscles?
nuclei are centered, they have intercalated disks,
spontaneous contraction
what is an intercalated disk and where is it found?
cardiac muscle, its a complex arrangement of cells, found
at the short axis of the myocyte at the end of the cell
what is the stimulus for a cardiac myocyte to
contract?
autorhythmic spontaneously contract and cause surround
CMs to contract via intervalated disks and branching
morphology of the cells
why is cardiac troponin I a bad thing to have in your
blood work?
, it is the only truly cardio-specific gene. if you have it in
your bloodstream it left your heart due to a heart attack
what is epicardium?
blood vessels, adipose tissue, nerves, and a dense layer
of connective tissue, maybe some stem cells
what cells deposit collagen in the myocardium after
an infarction?
fibroblasts
what layer of the heart gives rise to the coronary
arteries?
epicardium
what is found in the sub-endocardium?
purkinje fibers
what are the three layers of heart valves and what are
their functions?
fibrosa (collagen), spongiosa (proteoglycan), and
atrialis/ventricularis(elastin)
what shapes the valves during development?
mechanical forces such as laminar shear stress from left
ventricle and oscillatory shear stress of sinus
what is the effect on heart valves if the mechanical
environment is altered during development?
they don't develop right - dysgenesis
during an echocardiogram, agitated normal saline is
injected into a peripheral vein. bubbles are then
observed entering the left atrium. what cardiac
structure did not fully close during development?
foramen ovale
during an ultrasound at 22 weeks, it is found that the
heart has an undivided outflow tract that sits over the
top of the left and right ventricles. what is the
