Brigham Young University Cell 220 Exam 2 || All Accurately
Answered.
What are the three types of muscle tissue? correct answers Skeletal, Cardiac, and Smooth
What are the properties of muscle tissue? correct answers Excitability, Contractility, Elasticity,
and Extensability
Where is cardiac muscle found? correct answers The Myocardium of the Heart
What are the Characteristics of Cardiac Muscle? correct answers Branches Fibers, 1 or 2 nuclei,
Intercalated discs, Striations, auto-rhythmic, Involuntary
Where is smooth muscle found? correct answers Walls of visceral organs
What are the characteristics of smooth muscle? correct answers Fusiform shape, 1 nucleus, no
striations, involuntary, fatigue-resistant
What are the characteristics of skeletal muscle? correct answers Large, Cylindrical, many nuclei,
striated, voluntary, vascular, innervated at neuromuscular junctions, formed from fusion of
myoblasts
What are the functions of skeletal muscle? correct answers Movement, posture maintenance,
temperature regulation, storage of materials (amino acids and glycogen), movement of materials,
support abdominal organs, joint stabilization
The endomysium wraps... correct answers Muscle fibers
The perimysium wraps... correct answers Fascicles
,The epimysium wraps... correct answers Entire muscles
Deep fascia wraps... correct answers Muscle groups
What is the order of skeletal muscle organization from smallest to largest? correct answers
Myosin/Actin proteins, thick/thin filaments, myofibril, myofiber, fascicle, muscle, muscle group
Collagen fibers of endomysium, perimysium, and epimysium are __________ with tendons
correct answers Continuous
What wraps a muscle fiber? correct answers The Sarcolemma
Tendons connect muscles to... correct answers Bones or skin
An aponeurosis is a... correct answers Flat tendon
Testosterone makes muscle fibers... correct answers Wider and thicker
Where is skeletal muscle found? correct answers Connected to the skeleton
What does actin do? correct answers Contracts muscle (acts)
What does myosin do? correct answers Binds to ATP
How do z lines move? correct answers Closer together. In toward M line.
, What do troponin and tropomyosin do to aid muscle movement? correct answers Make a
complex allowing actin to slide
Actin is a _____ filament correct answers Thin
Myosin is the _________ filament correct answers Thick
M lines are correct answers Anchors, immobile
Action potential occurs at the... correct answers Neuromuscular junction
The Terminal Cisternae... correct answers Hold nutrients (mostly calcium)
What is the process of muscle contraction? correct answers 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.
What is the process of muscle relaxation? correct answers 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 answers Fibers run parallel to the long axis of
the muscle (Ex: Rectus abdominis)
What is a circular fascicle arrangement? correct answers Fibers form concentric rings (Ex:
Orbicularis oculi)
Answered.
What are the three types of muscle tissue? correct answers Skeletal, Cardiac, and Smooth
What are the properties of muscle tissue? correct answers Excitability, Contractility, Elasticity,
and Extensability
Where is cardiac muscle found? correct answers The Myocardium of the Heart
What are the Characteristics of Cardiac Muscle? correct answers Branches Fibers, 1 or 2 nuclei,
Intercalated discs, Striations, auto-rhythmic, Involuntary
Where is smooth muscle found? correct answers Walls of visceral organs
What are the characteristics of smooth muscle? correct answers Fusiform shape, 1 nucleus, no
striations, involuntary, fatigue-resistant
What are the characteristics of skeletal muscle? correct answers Large, Cylindrical, many nuclei,
striated, voluntary, vascular, innervated at neuromuscular junctions, formed from fusion of
myoblasts
What are the functions of skeletal muscle? correct answers Movement, posture maintenance,
temperature regulation, storage of materials (amino acids and glycogen), movement of materials,
support abdominal organs, joint stabilization
The endomysium wraps... correct answers Muscle fibers
The perimysium wraps... correct answers Fascicles
,The epimysium wraps... correct answers Entire muscles
Deep fascia wraps... correct answers Muscle groups
What is the order of skeletal muscle organization from smallest to largest? correct answers
Myosin/Actin proteins, thick/thin filaments, myofibril, myofiber, fascicle, muscle, muscle group
Collagen fibers of endomysium, perimysium, and epimysium are __________ with tendons
correct answers Continuous
What wraps a muscle fiber? correct answers The Sarcolemma
Tendons connect muscles to... correct answers Bones or skin
An aponeurosis is a... correct answers Flat tendon
Testosterone makes muscle fibers... correct answers Wider and thicker
Where is skeletal muscle found? correct answers Connected to the skeleton
What does actin do? correct answers Contracts muscle (acts)
What does myosin do? correct answers Binds to ATP
How do z lines move? correct answers Closer together. In toward M line.
, What do troponin and tropomyosin do to aid muscle movement? correct answers Make a
complex allowing actin to slide
Actin is a _____ filament correct answers Thin
Myosin is the _________ filament correct answers Thick
M lines are correct answers Anchors, immobile
Action potential occurs at the... correct answers Neuromuscular junction
The Terminal Cisternae... correct answers Hold nutrients (mostly calcium)
What is the process of muscle contraction? correct answers 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.
What is the process of muscle relaxation? correct answers 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 answers Fibers run parallel to the long axis of
the muscle (Ex: Rectus abdominis)
What is a circular fascicle arrangement? correct answers Fibers form concentric rings (Ex:
Orbicularis oculi)
