BYU Cell 220 Exam 2 2026 Questions and
Answers
What are the three types of muscle tissue? - Correct answer-Skeletal, Cardiac, and
Smooth
What are the properties of muscle tissue? - Correct answer-Excitability,
Contractility, Elasticity, and Extensability
Where is cardiac muscle found? - Correct answer-The Myocardium of the Heart
What are the Characteristics of Cardiac Muscle? - Correct answer-Branches Fibers,
1 or 2 nuclei, Intercalated discs, Striations, auto-rhythmic, Involuntary
Where is smooth muscle found? - Correct answer-Walls of visceral organs
What are the characteristics of smooth muscle? - Correct answer-Fusiform shape, 1
nucleus, no striations, involuntary, fatigue-resistant
What are the characteristics of skeletal muscle? - Correct answer-Large,
Cylindrical, many nuclei, striated, voluntary, vascular, innervated at neuromuscular
junctions, formed from fusion of myoblasts
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,What are the functions of skeletal muscle? - Correct answer-Movement, posture
maintenance, temperature regulation, storage of materials (amino acids and
glycogen), movement of materials, support abdominal organs, joint stabilization
The endomysium wraps... - Correct answer-Muscle fibers
The perimysium wraps... - Correct answer-Fascicles
The epimysium wraps... - Correct answer-Entire muscles
Deep fascia wraps... - Correct answer-Muscle groups
What is the order of skeletal muscle organization from smallest to largest? -
Correct answer-Myosin/Actin proteins, thick/thin filaments, myofibril, myofiber,
fascicle, muscle, muscle group
Collagen fibers of endomysium, perimysium, and epimysium are __________ with
tendons - Correct answer-Continuous
What wraps a muscle fiber? - Correct answer-The Sarcolemma
Tendons connect muscles to... - Correct answer-Bones or skin
An aponeurosis is a... - Correct answer-Flat tendon
Testosterone makes muscle fibers... - Correct answer-Wider and thicker
Where is skeletal muscle found? - Correct answer-Connected to the skeleton
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,What does actin do? - Correct answer-Contracts muscle (acts)
What does myosin do? - Correct answer-Binds to ATP
How do z lines move? - Correct answer-Closer together. In toward M line.
What do troponin and tropomyosin do to aid muscle movement? - Correct answer-
Make a complex allowing actin to slide
Actin is a _____ filament - Correct answer-Thin
Myosin is the _________ filament - Correct answer-Thick
M lines are - Correct answer-Anchors, immobile
Action potential occurs at the... - Correct answer-Neuromuscular junction
The Terminal Cisternae... - Correct answer-Hold nutrients (mostly calcium)
What is the process of muscle contraction? - Correct answer-1. An action potential
arrives at the neuromuscular junction. 2. ACh is released, binds to receptors, and
opens sodium ion channels. 3. Action potential travels along the t-tubules. 4.
Calcium reacts with the troponin/tropomyosin complex, affecting actin first. 5.
Actin twists, Myosin slides. 6. The muscle shortens and produces tension.
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, What is the process of muscle relaxation? - Correct answer-1. Calcium is
reabsorbed (ATP is required), triggered by a lack of excitability. 2. Interaction
between thick and thin filaments relax. 3. Muscles lengthen and relax.
What is a parallel fascicle arrangement? - Correct answer-Fibers run parallel to the
long axis of the muscle (Ex: Rectus abdominis)
What is a circular fascicle arrangement? - Correct answer-Fibers form concentric
rings (Ex: Orbicularis oculi)
What is a convergent fascicle arrangement? - Correct answer-The origin of the
muscle is broad, and the fascicles converge toward the insertion (Ex: Pectoralis
major)
What does pennate mean? - Correct answer-Means feathered. The fascicles are
obliquely attached to the tendon. There are three types.
What is a bipennate arrangement? - Correct answer-There are two angles of
pennation, usually towards a center point (Ex: Rectus Femoris)
What is a unipennate arrangement? - Correct answer-There is only one angle of
pennation (Ex: Extensor digitorum)
What is a multipennate arrangement? - Correct answer-A muscle with multiple
angles of pennation. (Ex: Deltoid)
©COPYRIGHT 2025, ALL RIGHTS RESERVED 4
Answers
What are the three types of muscle tissue? - Correct answer-Skeletal, Cardiac, and
Smooth
What are the properties of muscle tissue? - Correct answer-Excitability,
Contractility, Elasticity, and Extensability
Where is cardiac muscle found? - Correct answer-The Myocardium of the Heart
What are the Characteristics of Cardiac Muscle? - Correct answer-Branches Fibers,
1 or 2 nuclei, Intercalated discs, Striations, auto-rhythmic, Involuntary
Where is smooth muscle found? - Correct answer-Walls of visceral organs
What are the characteristics of smooth muscle? - Correct answer-Fusiform shape, 1
nucleus, no striations, involuntary, fatigue-resistant
What are the characteristics of skeletal muscle? - Correct answer-Large,
Cylindrical, many nuclei, striated, voluntary, vascular, innervated at neuromuscular
junctions, formed from fusion of myoblasts
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,What are the functions of skeletal muscle? - Correct answer-Movement, posture
maintenance, temperature regulation, storage of materials (amino acids and
glycogen), movement of materials, support abdominal organs, joint stabilization
The endomysium wraps... - Correct answer-Muscle fibers
The perimysium wraps... - Correct answer-Fascicles
The epimysium wraps... - Correct answer-Entire muscles
Deep fascia wraps... - Correct answer-Muscle groups
What is the order of skeletal muscle organization from smallest to largest? -
Correct answer-Myosin/Actin proteins, thick/thin filaments, myofibril, myofiber,
fascicle, muscle, muscle group
Collagen fibers of endomysium, perimysium, and epimysium are __________ with
tendons - Correct answer-Continuous
What wraps a muscle fiber? - Correct answer-The Sarcolemma
Tendons connect muscles to... - Correct answer-Bones or skin
An aponeurosis is a... - Correct answer-Flat tendon
Testosterone makes muscle fibers... - Correct answer-Wider and thicker
Where is skeletal muscle found? - Correct answer-Connected to the skeleton
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
,What does actin do? - Correct answer-Contracts muscle (acts)
What does myosin do? - Correct answer-Binds to ATP
How do z lines move? - Correct answer-Closer together. In toward M line.
What do troponin and tropomyosin do to aid muscle movement? - Correct answer-
Make a complex allowing actin to slide
Actin is a _____ filament - Correct answer-Thin
Myosin is the _________ filament - Correct answer-Thick
M lines are - Correct answer-Anchors, immobile
Action potential occurs at the... - Correct answer-Neuromuscular junction
The Terminal Cisternae... - Correct answer-Hold nutrients (mostly calcium)
What is the process of muscle contraction? - Correct answer-1. An action potential
arrives at the neuromuscular junction. 2. ACh is released, binds to receptors, and
opens sodium ion channels. 3. Action potential travels along the t-tubules. 4.
Calcium reacts with the troponin/tropomyosin complex, affecting actin first. 5.
Actin twists, Myosin slides. 6. The muscle shortens and produces tension.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
, What is the process of muscle relaxation? - Correct answer-1. Calcium is
reabsorbed (ATP is required), triggered by a lack of excitability. 2. Interaction
between thick and thin filaments relax. 3. Muscles lengthen and relax.
What is a parallel fascicle arrangement? - Correct answer-Fibers run parallel to the
long axis of the muscle (Ex: Rectus abdominis)
What is a circular fascicle arrangement? - Correct answer-Fibers form concentric
rings (Ex: Orbicularis oculi)
What is a convergent fascicle arrangement? - Correct answer-The origin of the
muscle is broad, and the fascicles converge toward the insertion (Ex: Pectoralis
major)
What does pennate mean? - Correct answer-Means feathered. The fascicles are
obliquely attached to the tendon. There are three types.
What is a bipennate arrangement? - Correct answer-There are two angles of
pennation, usually towards a center point (Ex: Rectus Femoris)
What is a unipennate arrangement? - Correct answer-There is only one angle of
pennation (Ex: Extensor digitorum)
What is a multipennate arrangement? - Correct answer-A muscle with multiple
angles of pennation. (Ex: Deltoid)
©COPYRIGHT 2025, ALL RIGHTS RESERVED 4
