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BMSC207 Muscles Exam with Questions Solved 100% Correct
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BMSC207 Muscles Exam with Questions Solved 100% Correct
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BMSC207 Muscles Exam with QuestionsSolved 100% Correct
What is the function of titin? - Answer stabilizes thick filaments and the elastic
recoil behaviour of muscle
What is the function of nebulin? - Answer interacts with thin filaments, believed to
regulate the length of thin filaments and contribute to the structural integrity of
myofibrils
What is a sarcomere? - Answer contractile unit of a muscle fiber
-thick and thin filaments organized within myofibrils
What are the regions of the sarcomere? - Answer Z-disk
I-Band
A-band
,H-zone
M-line
What is a myofibril w.r.t. sarcomeres? - Answer They are many sarcomeres stacked
end to end
What do thin filaments attach to within the sarcomere? - Answer The Z disk
What is the lightest band of sarcomeres? - Answer I bands- only in thin filaments
What is the darkest band of sarcomeres? - Answer A band- where thick and thin
filaments overlap
What is the H zone of a sarcomere? - Answer a moderately dark region close to
the center, where only thick filaments present
What is the M line of a sarcomere? - Answer dark region in the center, where
thick filaments attach
what cuts an I band in half
what does this mean - Answer a Z-disc
each half of an I band belongs to a different sarcomere
,What are transverse tubules? - Answer a network of tubes extending deep within
a muscle fiber: continuous with the sarcolemma
∴the lumen of a T tubule is the ECF
What is the primary function of all muscles? - Answer Generate force or movement
in response to a physiological stimulus
what are muscles dependant on to generate force - Answer Conversion of
chemical energy
-ATP
What does striated muscle mean? - Answer muscle shows alternating light and
dark patterns under the microscope
Is skeletal muscle under voluntary or involuntary control - Answer primarily voluntary by
somatic motor neurons
What is the nucleation state of skeletal muscle? - Answer multinucleated
What is the striation state of skeletal muscle? - Answer Striated
Where is skeletal muscle located in the body? - Answer attached to bones
Is cardiac muscle under voluntary or involuntary control? - Answer Primarily
involuntary by spontaneous electrical activity
What is the nucleation state of cardiac muscle? - Answer uninucleated
What is the striation state of cardiac muscle? - Answer striated
, Where is cardiac muscle located in the body? - Answer The heart
How can the spontaneous function of cardiac muscle be altered? - Answer by
autonomic NS and hormones
Is smooth muscle under voluntary or involuntary control? - Answer Primarily involuntary
through autonomic control, spontaneous, hormones, paracrines and autocrines
-depending on its location
What is the nucleation state of smooth muscle? - Answer uninucleated
What is the striation state of smooth muscle? - Answer nonstriated
Where is smooth muscle located in the body? - Answer internal organs and vasculature
What does smooth muscle provide mechanical control for? - Answer digestive tract
urinary tract
reproductive tract
blood vessels
airways
What is smooth muscles main function? - Answer move substances into, out of or within
the body
How are skeletal muscles attached to bones? - Answer by tendons
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