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The neurotransmitter released at a neuromuscular junction (in skeletal muscle) is dopamine.

A) True
B) False

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The proteins found in the A band of a sarcomere is/are


A) actin and myosin.
B) actin, myosin, titin, troponin, and tropomyosin.
C) myosin and titin.
D) tropomyosin and troponin.

E) B) and C)
F) A) and C)

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_____ are large dense irregular connective tissue sheets that wrap around groups of skeletal muscles.


A) Epimysium
B) Perimysium
C) Endomysium
D) Fascia

E) B) and C)
F) None of the above

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Compare the microscopic anatomy and the resistance to fatigue of the three types of skeletal muscle fibers.

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An increase (hypertrophy) or decrease (atrophy) in muscle size is due to: 1. increased or decreased numbers of muscle cells. 2) increased or decreased deposition of adipose tissue. 3) increased or decreased size of skeletal muscle fibers.


A) 1 only
B) 2 only
C) 3 only
D) both 1 and 3.

E) None of the above
F) C) and D)

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Match the connective tissue components of skeletal muscle with the tissues. Identify the description that matches acetylcholine receptors.


A) integral transmembrane proteins of axon membrane; bind with acetylcholine
B) integral transmembrane proteins of motor end plate; bind with acetylcholine

C) A) and B)
D) undefined

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The muscle fibers that are oxidative and resistant to fatigue are the slow oxidative fibers.

A) True
B) False

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A bundle (fascicle) of skeletal muscle fibers (cells) is separated from neighboring bundles by perimysium.

A) True
B) False

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When examined microscopically, striations are visible in the _____ muscle tissues.


A) cardiac and skeletal
B) smooth and skeletal
C) cardiac and smooth
D) skeletal ONLY

E) None of the above
F) A) and D)

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Which group of muscles usually weaken first impacting the daily activities of individuals over 65?


A) muscles of the abdomen
B) muscles of the lower limb
C) muscles of the thorax
D) muscles of the upper limb

E) A) and B)
F) A) and C)

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The two types of smooth muscle tissue are:


A) visceral (single-unit) and parietal.
B) red and white.
C) visceral (single-unit) and multiunit.
D) radial and circular.

E) A) and B)
F) A) and C)

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After years of living a sedentary life, you start a couch-to-13.1K training regimen. This change in activity includes daily long distance runs. These distance runs are inducing changes in which muscle fiber types?


A) slow oxidative fibers into fast oxidative glycolytic fibers
B) fast oxidative glycolytic fibers into fast glycolytic fibers
C) fast glycolytic fibers into fast oxidative glycolytic fibers
D) fast glycolytic fibers into slow oxidative fibers

E) A) and C)
F) B) and C)

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List, categorize, and describe the proteins found in myofibrils.

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See the section on structure of skeletal...

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This band labeled A will shorten during muscle contraction. This band labeled A will shorten during muscle contraction.

A) True
B) False

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Track and field athletes specializing in the 100 meter dash will train their bodies for explosive power when pushing off the starting blocks. Which type of muscle fiber is being isolated during strength training to generate this explosive power?


A) slow oxidative fibers
B) fast oxidative glycolytic fibers
C) fast glycolytic fibers

D) A) and B)
E) A) and C)

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Which of the following is TRUE of myosin? 1) It is located in the A band of the sarcomere. 2) It binds to tropomyosin during contraction. 3) It forms thick filaments. 4) The molecules are helix shaped.


A) 1, 2, 3, 4
B) 1, 2, 3 only
C) 1, 3 only
D) 2, 4 only

E) A) and C)
F) None of the above

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Match the connective tissue components of skeletal muscle with the tissues. Match epimysium with the correct tissue type.


A) areolar connective tissue plus adipose tissue
B) dense irregular connective tissue

C) A) and B)
D) undefined

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The transverse (T) tubule is a specialized region of sarcolemma that is located at a neuromuscular junction.

A) True
B) False

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Cardiac muscle tissue may be classified as either visceral (single-unit) or multiunit muscle tissue.

A) True
B) False

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Match the connective tissue components of skeletal muscle with the tissues. Match endomysium with the correct tissue type.


A) loose connective tissue (mostly reticular fibers)
B) dense connective tissue

C) A) and B)
D) undefined

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