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BYU CELL 220 EXAM QUESTIONS AND
ANSWERS 2025
What are the three types of muscle tissue? - .....ANSWER
...✔✔ Skeletal, Cardiac, and Smooth
What are the properties of muscle tissue? - .....ANSWER
...✔✔ Excitability, Contractility, Elasticity, and
Extensability
Where is cardiac muscle found? - .....ANSWER ...✔✔
The Myocardium of the Heart
What are the Characteristics of Cardiac Muscle? -
.....ANSWER ...✔✔ Branches Fibers, 1 or 2 nuclei,
Intercalated discs, Striations, auto-rhythmic, Involuntary
Where is smooth muscle found? - .....ANSWER ...✔✔
Walls of visceral organs
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What are the characteristics of smooth muscle? -
.....ANSWER ...✔✔ Fusiform shape, 1 nucleus, no
striations, involuntary, fatigue-resistant
What are the characteristics of skeletal muscle? -
.....ANSWER ...✔✔ Large, Cylindrical, many nuclei,
striated, voluntary, vascular, innervated at
neuromuscular junctions, formed from fusion of myoblasts
What are the functions of skeletal muscle? - .....ANSWER
...✔✔ Movement, posture maintenance, temperature
regulation, storage of materials (amino acids and
glycogen), movement of materials, support abdominal
organs, joint stabilization
The endomysium wraps... - .....ANSWER ...✔✔ Muscle
fibers
The perimysium wraps... - .....ANSWER ...✔✔ Fascicles
The epimysium wraps... - .....ANSWER ...✔✔ Entire
muscles
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Deep fascia wraps... - .....ANSWER ...✔✔ Muscle
groups
What is the order of skeletal muscle organization from
smallest to largest? - .....ANSWER ...✔✔ Myosin/Actin
proteins, thick/thin filaments, myofibril, myofiber,
fascicle, muscle, muscle group
Collagen fibers of endomysium, perimysium, and
epimysium are __________ with tendons - .....ANSWER
...✔✔ Continuous
What wraps a muscle fiber? - .....ANSWER ...✔✔ The
Sarcolemma
Tendons connect muscles to... - .....ANSWER ...✔✔
Bones or skin
An aponeurosis is a... - .....ANSWER ...✔✔ Flat tendon
Testosterone makes muscle fibers... - .....ANSWER
...✔✔ Wider and thicker
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Where is skeletal muscle found? - .....ANSWER ...✔✔
Connected to the skeleton
What does actin do? - .....ANSWER ...✔✔ Contracts
muscle (acts)
What does myosin do? - .....ANSWER ...✔✔ Binds to
ATP
How do z lines move? - .....ANSWER ...✔✔ Closer
together. In toward M line.
What do troponin and tropomyosin do to aid muscle
movement? - .....ANSWER ...✔✔ Make a complex
allowing actin to slide
Actin is a _____ filament - .....ANSWER ...✔✔ Thin
Myosin is the _________ filament - .....ANSWER
...✔✔ Thick
M lines are - .....ANSWER ...✔✔ Anchors, immobile
BYU CELL 220 EXAM QUESTIONS AND
ANSWERS 2025
What are the three types of muscle tissue? - .....ANSWER
...✔✔ Skeletal, Cardiac, and Smooth
What are the properties of muscle tissue? - .....ANSWER
...✔✔ Excitability, Contractility, Elasticity, and
Extensability
Where is cardiac muscle found? - .....ANSWER ...✔✔
The Myocardium of the Heart
What are the Characteristics of Cardiac Muscle? -
.....ANSWER ...✔✔ Branches Fibers, 1 or 2 nuclei,
Intercalated discs, Striations, auto-rhythmic, Involuntary
Where is smooth muscle found? - .....ANSWER ...✔✔
Walls of visceral organs
,2|Page
What are the characteristics of smooth muscle? -
.....ANSWER ...✔✔ Fusiform shape, 1 nucleus, no
striations, involuntary, fatigue-resistant
What are the characteristics of skeletal muscle? -
.....ANSWER ...✔✔ Large, Cylindrical, many nuclei,
striated, voluntary, vascular, innervated at
neuromuscular junctions, formed from fusion of myoblasts
What are the functions of skeletal muscle? - .....ANSWER
...✔✔ Movement, posture maintenance, temperature
regulation, storage of materials (amino acids and
glycogen), movement of materials, support abdominal
organs, joint stabilization
The endomysium wraps... - .....ANSWER ...✔✔ Muscle
fibers
The perimysium wraps... - .....ANSWER ...✔✔ Fascicles
The epimysium wraps... - .....ANSWER ...✔✔ Entire
muscles
,3|Page
Deep fascia wraps... - .....ANSWER ...✔✔ Muscle
groups
What is the order of skeletal muscle organization from
smallest to largest? - .....ANSWER ...✔✔ Myosin/Actin
proteins, thick/thin filaments, myofibril, myofiber,
fascicle, muscle, muscle group
Collagen fibers of endomysium, perimysium, and
epimysium are __________ with tendons - .....ANSWER
...✔✔ Continuous
What wraps a muscle fiber? - .....ANSWER ...✔✔ The
Sarcolemma
Tendons connect muscles to... - .....ANSWER ...✔✔
Bones or skin
An aponeurosis is a... - .....ANSWER ...✔✔ Flat tendon
Testosterone makes muscle fibers... - .....ANSWER
...✔✔ Wider and thicker
, 4|Page
Where is skeletal muscle found? - .....ANSWER ...✔✔
Connected to the skeleton
What does actin do? - .....ANSWER ...✔✔ Contracts
muscle (acts)
What does myosin do? - .....ANSWER ...✔✔ Binds to
ATP
How do z lines move? - .....ANSWER ...✔✔ Closer
together. In toward M line.
What do troponin and tropomyosin do to aid muscle
movement? - .....ANSWER ...✔✔ Make a complex
allowing actin to slide
Actin is a _____ filament - .....ANSWER ...✔✔ Thin
Myosin is the _________ filament - .....ANSWER
...✔✔ Thick
M lines are - .....ANSWER ...✔✔ Anchors, immobile
