BIOS 252 Exam 1 QUESTIONS AND ACCURATE | Questions
with 100% Verified Answers | Latest Update 2026/2027
Question: Skeletal Muscle
Answer: striated, voluntary, no intercalated discs, multinucleated
Question: Cardiac Muscle
Answer: striated, involuntary, intercalated discs, uninucleated
Question: Smooth Muscle
Answer: non-striated, involuntary, no intercalated discs, uninucleated
Question: 4 major functions of muscles
Answer: produce body movement, stabilize positions, store and move substances, generate
heat
Question: 4 properties of muscles
Answer: electrical excitability, contractility, extensibility, elasticity
Question: Electrical Excitability
Answer: ability to respond to a stimulus and convert it to an action potential
Question: Contractility
Answer: ability to shorten
Question: Extensibility
Answer: ability to stretch without tearing to a certain degree
Question: Elasticity
Answer: ability to return to resting length after contracting or stretching
Question: Organization of Skeletal Muscle from largest to smallest
Answer: skeletal muscle, fascicle, muscle fiber, myofibril, microfilament
Question: Organization of Skeletal Muscle from smallest to largest
Answer: microfilament, myofibril, muscle fiber, fascicle, skeletal muscle
Question: Sarcomere
Answer: contractile unit of a muscle fiber
, Question: sarcolemma
Answer: plasma membrane of a muscle fiber
Question: sarcoplasmic reticulum
Answer: specialized endoplasmic reticulum of muscle cells that stores calcium
Question: z-disc
Answer: coin-shaped sheet of proteins that anchors the thin filaments and connects myofibrils
to
one another
Question: m-line
Answer: middle of sarcomere
Question: a band
Answer: dark area; extends length of the thick filaments (myosin)
Question: i band
Answer: light area; thin myofilaments only (z disc is center of i band)
Question: zone of overlap
Answer: the densest, darkest area on a light micrograph
where thick and thin filaments overlap
Question: thick filament
Answer: myosin
Question: thin filament
Answer: actin
Question: contractile protein
Answer: actin and myosin, generate the force during a muscle contraction
Question: structural protein
Answer: a type of protein that offers strength and shape to cells
Question: regulatory protein
Answer: tropomyosin and troponin; act like a switch to determine when the fiber can contract
and
when it cannot
with 100% Verified Answers | Latest Update 2026/2027
Question: Skeletal Muscle
Answer: striated, voluntary, no intercalated discs, multinucleated
Question: Cardiac Muscle
Answer: striated, involuntary, intercalated discs, uninucleated
Question: Smooth Muscle
Answer: non-striated, involuntary, no intercalated discs, uninucleated
Question: 4 major functions of muscles
Answer: produce body movement, stabilize positions, store and move substances, generate
heat
Question: 4 properties of muscles
Answer: electrical excitability, contractility, extensibility, elasticity
Question: Electrical Excitability
Answer: ability to respond to a stimulus and convert it to an action potential
Question: Contractility
Answer: ability to shorten
Question: Extensibility
Answer: ability to stretch without tearing to a certain degree
Question: Elasticity
Answer: ability to return to resting length after contracting or stretching
Question: Organization of Skeletal Muscle from largest to smallest
Answer: skeletal muscle, fascicle, muscle fiber, myofibril, microfilament
Question: Organization of Skeletal Muscle from smallest to largest
Answer: microfilament, myofibril, muscle fiber, fascicle, skeletal muscle
Question: Sarcomere
Answer: contractile unit of a muscle fiber
, Question: sarcolemma
Answer: plasma membrane of a muscle fiber
Question: sarcoplasmic reticulum
Answer: specialized endoplasmic reticulum of muscle cells that stores calcium
Question: z-disc
Answer: coin-shaped sheet of proteins that anchors the thin filaments and connects myofibrils
to
one another
Question: m-line
Answer: middle of sarcomere
Question: a band
Answer: dark area; extends length of the thick filaments (myosin)
Question: i band
Answer: light area; thin myofilaments only (z disc is center of i band)
Question: zone of overlap
Answer: the densest, darkest area on a light micrograph
where thick and thin filaments overlap
Question: thick filament
Answer: myosin
Question: thin filament
Answer: actin
Question: contractile protein
Answer: actin and myosin, generate the force during a muscle contraction
Question: structural protein
Answer: a type of protein that offers strength and shape to cells
Question: regulatory protein
Answer: tropomyosin and troponin; act like a switch to determine when the fiber can contract
and
when it cannot
