BIOS 252 CHAMBERLAIN
UNIVERSITY PRACTICE SOLUTION
PACK 2026 COMPLETE TESTED
QUESTIONS AND CORRECT
ANSWERS GRADED A+
◉ Cardiac Muscle . Answer:striated, involuntary, intercalated discs,
uninucleated
◉ Smooth Muscle . Answer:non-striated, involuntary, no intercalated
discs, uninucleated
◉ 4 major functions of muscles . Answer:produce body movement,
stabilize positions, store and move substances, generate heat
◉ 4 properties of muscles . Answer:electrical excitability, contractility,
extensibility, elasticity
◉ Electrical Excitability . Answer:ability to respond to a stimulus and
convert it to an action potential
◉ Contractility . Answer:ability to shorten
,◉ Extensibility . Answer:ability to stretch without tearing to a certain
degree
◉ Elasticity . Answer:ability to return to resting length after contracting
or stretching
◉ Organization of Skeletal Muscle from largest to smallest .
Answer:skeletal muscle, fascicle, muscle fiber, myofibril, microfilament
◉ Organization of Skeletal Muscle from smallest to largest .
Answer:microfilament, myofibril, muscle fiber, fascicle, skeletal muscle
◉ Sarcomere . Answer:contractile unit of a muscle fiber
◉ sarcolemma . Answer:plasma membrane of a muscle fiber
◉ sarcoplasmic reticulum . Answer:specialized endoplasmic reticulum
of muscle cells that stores calcium
◉ z-disc . Answer:coin-shaped sheet of proteins that anchors the thin
filaments and connects myofibrils to one another
◉ m-line . Answer:middle of sarcomere
, ◉ a band . Answer:dark area; extends length of the thick filaments
(myosin)
◉ i band . Answer:light area; thin myofilaments only (z disc is center of i
band)
◉ zone of overlap . Answer:the densest, darkest area on a light
micrograph
where thick and thin filaments overlap
◉ thick filament . Answer:myosin
◉ thin filament . Answer:actin
◉ contractile protein . Answer:actin and myosin, generate the force
during a muscle contraction
◉ structural protein . Answer:a type of protein that offers strength and
shape to cells
◉ regulatory protein . Answer:tropomyosin and troponin; act like a
switch to determine when the fiber can contract and when it cannot
UNIVERSITY PRACTICE SOLUTION
PACK 2026 COMPLETE TESTED
QUESTIONS AND CORRECT
ANSWERS GRADED A+
◉ Cardiac Muscle . Answer:striated, involuntary, intercalated discs,
uninucleated
◉ Smooth Muscle . Answer:non-striated, involuntary, no intercalated
discs, uninucleated
◉ 4 major functions of muscles . Answer:produce body movement,
stabilize positions, store and move substances, generate heat
◉ 4 properties of muscles . Answer:electrical excitability, contractility,
extensibility, elasticity
◉ Electrical Excitability . Answer:ability to respond to a stimulus and
convert it to an action potential
◉ Contractility . Answer:ability to shorten
,◉ Extensibility . Answer:ability to stretch without tearing to a certain
degree
◉ Elasticity . Answer:ability to return to resting length after contracting
or stretching
◉ Organization of Skeletal Muscle from largest to smallest .
Answer:skeletal muscle, fascicle, muscle fiber, myofibril, microfilament
◉ Organization of Skeletal Muscle from smallest to largest .
Answer:microfilament, myofibril, muscle fiber, fascicle, skeletal muscle
◉ Sarcomere . Answer:contractile unit of a muscle fiber
◉ sarcolemma . Answer:plasma membrane of a muscle fiber
◉ sarcoplasmic reticulum . Answer:specialized endoplasmic reticulum
of muscle cells that stores calcium
◉ z-disc . Answer:coin-shaped sheet of proteins that anchors the thin
filaments and connects myofibrils to one another
◉ m-line . Answer:middle of sarcomere
, ◉ a band . Answer:dark area; extends length of the thick filaments
(myosin)
◉ i band . Answer:light area; thin myofilaments only (z disc is center of i
band)
◉ zone of overlap . Answer:the densest, darkest area on a light
micrograph
where thick and thin filaments overlap
◉ thick filament . Answer:myosin
◉ thin filament . Answer:actin
◉ contractile protein . Answer:actin and myosin, generate the force
during a muscle contraction
◉ structural protein . Answer:a type of protein that offers strength and
shape to cells
◉ regulatory protein . Answer:tropomyosin and troponin; act like a
switch to determine when the fiber can contract and when it cannot
