KNS 480 Exam 3 Question and
answers verified to pass 2025/2026
blood travels away from the heart in ___________ and back to the heart in ____________ - correct
answer ✔arteries
veins
arteries branch into _____________ which then become _____________ - correct answer ✔arterioles
capillaries
blood flows from capillaries to small venous vessels called __________ which increase in size to become
veins - correct answer ✔venules
interventricular septum is the - correct answer ✔muscular wall separating the left and right side of the
heart
interventricular septum prevents the - correct answer ✔mixing of blood on each side
the two valves connecting the atria to the ventricles (atrioventricular valves) - correct answer
✔tricuspid valve (right)
bicuspid valve (left)
valves preventing back flow from the arteries into the ventricles - correct answer ✔pulmonary
semilunar valve (right ventricle)
aortic semilunar valve (left ventricle)
right side pumps blood through _______________ circulation, left side pumps blood through
______________ circulation - correct answer ✔pulmonary
,systemic
myocardium is also known as the "___________________" - correct answer ✔heart muscle
what does the myocardium do? - correct answer ✔force blood out of the heart and contracting the
heart
where does the myocardium receive its blood supply - correct answer ✔the right and left coronary
arteries
when does a myocardial infarction (heart attack) occur? - correct answer ✔when coronary blood flow is
disrupted for more than several minutes causing permanent heart damage
myocardium is the (top/middle/bottom) layer of the heart? - correct answer ✔middle
actin and myosin
heart and/or skeletal? - correct answer ✔both
shape of muscle fibers
heart and/or skeletal? - correct answer ✔skeletal = elongated and not branching
heart = shorter than skeletal and branching
how many nuclei
heart and/or skeletal? - correct answer ✔heart = single
, skeletal = multiple
z-discs present
heart and/or skeletal muscle? - correct answer ✔present in both
striated cells?
heart and/or skeletal muscle? - correct answer ✔present in both
cellular junctions?
heart and/or skeletal muscle? - correct answer ✔heart = yes, intercalated discs
skeletal = no
what type(s) of connective tissue
heart and/or skeletal muscle? - correct answer ✔heart = endomysium
skeletal = epimysium, perimysium, and endomysium
what type of energy production
heart and/or skeletal muscle? - correct answer ✔heart = aerobic
skeletal = aerobic and anaerobic
answers verified to pass 2025/2026
blood travels away from the heart in ___________ and back to the heart in ____________ - correct
answer ✔arteries
veins
arteries branch into _____________ which then become _____________ - correct answer ✔arterioles
capillaries
blood flows from capillaries to small venous vessels called __________ which increase in size to become
veins - correct answer ✔venules
interventricular septum is the - correct answer ✔muscular wall separating the left and right side of the
heart
interventricular septum prevents the - correct answer ✔mixing of blood on each side
the two valves connecting the atria to the ventricles (atrioventricular valves) - correct answer
✔tricuspid valve (right)
bicuspid valve (left)
valves preventing back flow from the arteries into the ventricles - correct answer ✔pulmonary
semilunar valve (right ventricle)
aortic semilunar valve (left ventricle)
right side pumps blood through _______________ circulation, left side pumps blood through
______________ circulation - correct answer ✔pulmonary
,systemic
myocardium is also known as the "___________________" - correct answer ✔heart muscle
what does the myocardium do? - correct answer ✔force blood out of the heart and contracting the
heart
where does the myocardium receive its blood supply - correct answer ✔the right and left coronary
arteries
when does a myocardial infarction (heart attack) occur? - correct answer ✔when coronary blood flow is
disrupted for more than several minutes causing permanent heart damage
myocardium is the (top/middle/bottom) layer of the heart? - correct answer ✔middle
actin and myosin
heart and/or skeletal? - correct answer ✔both
shape of muscle fibers
heart and/or skeletal? - correct answer ✔skeletal = elongated and not branching
heart = shorter than skeletal and branching
how many nuclei
heart and/or skeletal? - correct answer ✔heart = single
, skeletal = multiple
z-discs present
heart and/or skeletal muscle? - correct answer ✔present in both
striated cells?
heart and/or skeletal muscle? - correct answer ✔present in both
cellular junctions?
heart and/or skeletal muscle? - correct answer ✔heart = yes, intercalated discs
skeletal = no
what type(s) of connective tissue
heart and/or skeletal muscle? - correct answer ✔heart = endomysium
skeletal = epimysium, perimysium, and endomysium
what type of energy production
heart and/or skeletal muscle? - correct answer ✔heart = aerobic
skeletal = aerobic and anaerobic
