BIOS-214 QUIZ EXAM 2 QUESTIONS & VERIFIED
ANSWERS
Which of the following is not true of Elastic Filaments?
A) They attach to Z discs
B) They run through the core of Thin Filaments
C) They are composed of Titin
D) They keep Thick and Thin Filaments aligned
E) They prevent overstretching of muscle fibers - Answers - B) They run through the
core of Thin Filaments.
- Elastic Filaments run within the Thick Filament to attach to the M line
Posture is maintained by ____ fibers
A) Fast Glycolytic (FG)
B) Slow Oxidative (SO)
C) White
D) Fast-Twitch
E) Type-II - Answers - B) Slow Oxidative (SO)
-Contract slowly, are extremely resistant to fatigue as long as there is enough O2
present, & deliver prolonged contraction
Action potentials are propagated from the surface to the interior of a muscle fiber by
way of...
A) The Myofibrils
B) The Sarcomeres
C) The Endomysium
D) The Sarcoplasmic Reticulum
E) The T-Tubules - Answers - E) The T-Tubules
-These are deep invaginations of the Sarcolemma that run between each pair of
Terminal Cisterns
Which of the following is considered to be the "functional unit" of skeletal muscle fibers?
A) The Z-Disc
B) The Neuromuscular Junction
C) The Sarcomere
D) The Sarcoplasmic Reticulum
E) The Myofilaments - Answers - C) The Sarcomere
-These are the basic unit of contraction in skeletal muscle
A Motor Unit is...
A) One myofibril of a muscle fiber
B) One neuronal axon and all the muscle fibers innervated by it
, C) The distance from one Z-disc to the next
D) One neuromuscular junction
E) One thick filament and all thin filaments with which it forms cross bridges - Answers -
B) One neuronal axon and all the muscle fibers innervated by it
Which is not a function of Skeletal Muscle?
A) Stability
B) Heat production
C) Communication
D) All of these are functions of skeletal muscle
E) Movement - Answers - D) All of these are functions of skeletal muscle
The region of a Sarcomere where Actin and Myosin overlap is?
A) The A-band
B) The I-band
C) The big band
D) The H-band
E) The Z-disc - Answers - A) The A-band
In contrast to Skeletal Muscle, Smooth Muscle has all of the following properties
except...
A) A lack of Z-discs
B) Ability to regenerate through the process of mitosis
C) One nucleus in each cell
D) An increased number of T-tubules
E) A lack of striations - Answers - D) An increased number of T-tubules
Which of the following is an Autoimmune Disorder that leads to destruction of
Acetylcholine Receptors?
A) Duchenne Muscular Dystrophy
B) Atrophy
C) Myasthenia Gravis
D) Rhabdomyoma
E) Crush Syndrome - Answers - C) Myasthenia Gravis
Slow Oxidative (SO) fibers have more ____ and less ____ than Fast Glycolytic (FG)
fibers.
A) Glycogen, Myoglobin
B) Lactic Acid, ATP
C) Capillaries, Mitochondria
D) ATP, Mitochondria
E) Myoglobin, Glycogen - Answers - E) Myoglobin, Glycogen
All of the following move the Mandible except...
A) The Masseter
B) The Lateral Pterygoid
ANSWERS
Which of the following is not true of Elastic Filaments?
A) They attach to Z discs
B) They run through the core of Thin Filaments
C) They are composed of Titin
D) They keep Thick and Thin Filaments aligned
E) They prevent overstretching of muscle fibers - Answers - B) They run through the
core of Thin Filaments.
- Elastic Filaments run within the Thick Filament to attach to the M line
Posture is maintained by ____ fibers
A) Fast Glycolytic (FG)
B) Slow Oxidative (SO)
C) White
D) Fast-Twitch
E) Type-II - Answers - B) Slow Oxidative (SO)
-Contract slowly, are extremely resistant to fatigue as long as there is enough O2
present, & deliver prolonged contraction
Action potentials are propagated from the surface to the interior of a muscle fiber by
way of...
A) The Myofibrils
B) The Sarcomeres
C) The Endomysium
D) The Sarcoplasmic Reticulum
E) The T-Tubules - Answers - E) The T-Tubules
-These are deep invaginations of the Sarcolemma that run between each pair of
Terminal Cisterns
Which of the following is considered to be the "functional unit" of skeletal muscle fibers?
A) The Z-Disc
B) The Neuromuscular Junction
C) The Sarcomere
D) The Sarcoplasmic Reticulum
E) The Myofilaments - Answers - C) The Sarcomere
-These are the basic unit of contraction in skeletal muscle
A Motor Unit is...
A) One myofibril of a muscle fiber
B) One neuronal axon and all the muscle fibers innervated by it
, C) The distance from one Z-disc to the next
D) One neuromuscular junction
E) One thick filament and all thin filaments with which it forms cross bridges - Answers -
B) One neuronal axon and all the muscle fibers innervated by it
Which is not a function of Skeletal Muscle?
A) Stability
B) Heat production
C) Communication
D) All of these are functions of skeletal muscle
E) Movement - Answers - D) All of these are functions of skeletal muscle
The region of a Sarcomere where Actin and Myosin overlap is?
A) The A-band
B) The I-band
C) The big band
D) The H-band
E) The Z-disc - Answers - A) The A-band
In contrast to Skeletal Muscle, Smooth Muscle has all of the following properties
except...
A) A lack of Z-discs
B) Ability to regenerate through the process of mitosis
C) One nucleus in each cell
D) An increased number of T-tubules
E) A lack of striations - Answers - D) An increased number of T-tubules
Which of the following is an Autoimmune Disorder that leads to destruction of
Acetylcholine Receptors?
A) Duchenne Muscular Dystrophy
B) Atrophy
C) Myasthenia Gravis
D) Rhabdomyoma
E) Crush Syndrome - Answers - C) Myasthenia Gravis
Slow Oxidative (SO) fibers have more ____ and less ____ than Fast Glycolytic (FG)
fibers.
A) Glycogen, Myoglobin
B) Lactic Acid, ATP
C) Capillaries, Mitochondria
D) ATP, Mitochondria
E) Myoglobin, Glycogen - Answers - E) Myoglobin, Glycogen
All of the following move the Mandible except...
A) The Masseter
B) The Lateral Pterygoid
