BIOL 3100 UNIT 4 EXAM QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE 2026
What is the primary function of muscle tissue? - Answers Muscle tissue allows for movement of the
body or body parts, as well as movement of blood, food, and other substances within the body.
What are the three types of muscle fibers? - Answers Skeletal muscle fibers, cardiac muscle fibers,
and smooth muscle fibers.
What is the function of skeletal muscle? - Answers Movement of the body or body parts, maintaining
posture.
Where is cardiac muscle found? - Answers In the heart.
Where is smooth muscle located? - Answers In the walls of internal organs, blood vessels, ureters, and
the GI tract.
What is the structure of skeletal muscle fibers? - Answers Long cylinder, unbranched.
What are the distinguishing features of skeletal muscle? - Answers Striations, multinucleated.
What are the distinguishing features of cardiac muscle? - Answers Striations, intercalated discs, single
nucleus.
What are the distinguishing features of smooth muscle? - Answers Non-striated, single nucleus.
What is a muscle fiber (myocyte)? - Answers Single muscle cells that work together to create
movement in the body.
What is a fascicle? - Answers A group of muscle cells (fibers) that are grouped together in parallel
within a connective tissue sheath.
What is the endomysium? - Answers Loose connective tissue surrounding muscle cells/fibers.
What is the perimysium? - Answers Fibrous sheath which divides muscle tissue into fascicles.
What is the epimysium? - Answers Fibrous sheath which surrounds entire skeletal muscles.
What is fascia? - Answers Connective tissue that wraps muscles of similar function together.
What is the periosteum? - Answers A dense layer of vascular connective tissue enveloping the bones
except at the surface of joints.
What is a tendon? - Answers A fibrous tissue that connects muscles to bones or other structures.
What is the sarcolemma? - Answers Cell membrane of a muscle cell.
What is the sarcoplasm? - Answers Cytoplasm of a muscle cell where metabolic processes occur.
What is the function of mitochondria in muscle fibers? - Answers Responsible for ATP production.
What is the sarcoplasmic reticulum? - Answers Organelle that stores, releases, and reabsorbs calcium
ions, essential for muscle contraction and relaxation.
What are myofibrils? - Answers Thread-like structures within muscle fibers made up of protein
filaments called myofilaments.
What is a sarcomere? - Answers The basic unit of muscle that is responsible for muscle contraction.
What are myofilaments? - Answers Protein filaments that move in relation to each other to shorten
sarcomeres and cause muscle contraction.
Why do skeletal muscle fibers have many nuclei? - Answers For increased protein production due to
the large amounts of structural, regulatory, and functional proteins needed for muscle function.
Why do skeletal muscle fibers have many mitochondria? - Answers A large amount of energy is
needed for muscle contraction and relaxation.
What are the four basic structural patterns of skeletal muscle? - Answers Circular, parallel,
convergent, and pennate.
What is a circular muscle? - Answers Fascicles are arranged in concentric rings, surrounding external
body openings.
What is a parallel muscle? - Answers Fascicles run down the long axis of the muscle.
What is a convergent muscle? - Answers Has a broad origin with fascicles converging toward a single
tendon of insertion.
What is a pennate muscle? - Answers Fascicles are short and attach obliquely to a central tendon.
What is unipennate muscle? - Answers Fascicles insert into only one side of the tendon.
What is bipennate muscle? - Answers Fascicles insert into the tendon from opposite sides, resembling
a feather.
What is multipennate muscle? - Answers Looks like many feathers side by side, with all their quills
inserted into one large tendon.
What is a unipennate muscle? - Answers A muscle where fascicles insert into only one side of the
tendon.
What is the primary function of muscle tissue? - Answers Muscle tissue allows for movement of the
body or body parts, as well as movement of blood, food, and other substances within the body.
What are the three types of muscle fibers? - Answers Skeletal muscle fibers, cardiac muscle fibers,
and smooth muscle fibers.
What is the function of skeletal muscle? - Answers Movement of the body or body parts, maintaining
posture.
Where is cardiac muscle found? - Answers In the heart.
Where is smooth muscle located? - Answers In the walls of internal organs, blood vessels, ureters, and
the GI tract.
What is the structure of skeletal muscle fibers? - Answers Long cylinder, unbranched.
What are the distinguishing features of skeletal muscle? - Answers Striations, multinucleated.
What are the distinguishing features of cardiac muscle? - Answers Striations, intercalated discs, single
nucleus.
What are the distinguishing features of smooth muscle? - Answers Non-striated, single nucleus.
What is a muscle fiber (myocyte)? - Answers Single muscle cells that work together to create
movement in the body.
What is a fascicle? - Answers A group of muscle cells (fibers) that are grouped together in parallel
within a connective tissue sheath.
What is the endomysium? - Answers Loose connective tissue surrounding muscle cells/fibers.
What is the perimysium? - Answers Fibrous sheath which divides muscle tissue into fascicles.
What is the epimysium? - Answers Fibrous sheath which surrounds entire skeletal muscles.
What is fascia? - Answers Connective tissue that wraps muscles of similar function together.
What is the periosteum? - Answers A dense layer of vascular connective tissue enveloping the bones
except at the surface of joints.
What is a tendon? - Answers A fibrous tissue that connects muscles to bones or other structures.
What is the sarcolemma? - Answers Cell membrane of a muscle cell.
What is the sarcoplasm? - Answers Cytoplasm of a muscle cell where metabolic processes occur.
What is the function of mitochondria in muscle fibers? - Answers Responsible for ATP production.
What is the sarcoplasmic reticulum? - Answers Organelle that stores, releases, and reabsorbs calcium
ions, essential for muscle contraction and relaxation.
What are myofibrils? - Answers Thread-like structures within muscle fibers made up of protein
filaments called myofilaments.
What is a sarcomere? - Answers The basic unit of muscle that is responsible for muscle contraction.
What are myofilaments? - Answers Protein filaments that move in relation to each other to shorten
sarcomeres and cause muscle contraction.
Why do skeletal muscle fibers have many nuclei? - Answers For increased protein production due to
the large amounts of structural, regulatory, and functional proteins needed for muscle function.
Why do skeletal muscle fibers have many mitochondria? - Answers A large amount of energy is
needed for muscle contraction and relaxation.
What are the four basic structural patterns of skeletal muscle? - Answers Circular, parallel,
convergent, and pennate.
What is a circular muscle? - Answers Fascicles are arranged in concentric rings, surrounding external
body openings.
What is a parallel muscle? - Answers Fascicles run down the long axis of the muscle.
What is a convergent muscle? - Answers Has a broad origin with fascicles converging toward a single
tendon of insertion.
What is a pennate muscle? - Answers Fascicles are short and attach obliquely to a central tendon.
What is unipennate muscle? - Answers Fascicles insert into only one side of the tendon.
What is bipennate muscle? - Answers Fascicles insert into the tendon from opposite sides, resembling
a feather.
What is multipennate muscle? - Answers Looks like many feathers side by side, with all their quills
inserted into one large tendon.
What is a unipennate muscle? - Answers A muscle where fascicles insert into only one side of the
tendon.
