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The junction between an axon and the muscle fiber itself is called a _____________ junction.

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In addition to the thin filaments in I bands,there are protein filaments called ____________ that play a role in muscle elasticity.

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One of the names for the areolar connective tissue and adipose connective tissue that separates muscle from skin is ______________ fascia.

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Which is a correct listing of the hierarchy of a skeletal muscle's components,beginning with the smallest? A: Myofibrils B: Muscle fiber C: Fascicle D: Skeletal muscle


A) a,b,c,d
B) a,c,b,d
C) d,c,b,a
D) c,b,a,d
E) b,c,a,d

F) C) and D)
G) A) and C)

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The agonist is the muscle that contracts to produce a desired movement.

A) True
B) False

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Though the myofibrils within a muscle fiber run the length of the cell,they are actually composed of groupings of ______________ (protein filaments).

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A sarcomere is defined as the distance from one _____ to the next adjacent ____ .(The same answer fills in both spaces. )


A) Z disc
B) I band
C) H zone
D) A band
E) M line

F) A) and E)
G) B) and D)

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The more moveable attachment of a muscle is called its _______________.

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The resistance to fatigue of fast fibers is ______ when compared to that of slow or intermediate fibers.


A) low
B) high
C) identical

D) All of the above
E) B) and C)

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Which letter is associated with a zone that is more lightly shaded because only thick filaments are present?


A) I
B) A
C) M
D) Z
E) H

F) C) and D)
G) A) and B)

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The type of muscle fibers that are striated,form Y-shaped branches,and have junctions called intercalated discs are


A) skeletal.
B) cardiac.
C) smooth.
D) voluntary.
E) skeletal and voluntary.

F) C) and D)
G) All of the above

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What is the letter associated with the dark bands in a sarcomere?


A) I
B) A
C) Z
D) M
E) H

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

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The fascicles of a pennate muscle are at an oblique angle to the tendon.

A) True
B) False

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When the force is applied between the resistance and the fulcrum,the result is a _____ lever.


A) first-class
B) second-class
C) third-class

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

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Pennate muscles resemble a


A) triangle.
B) leaf.
C) spindle.
D) feather.
E) strap.

F) D) and E)
G) A) and B)

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The smallest sized member of a group of muscles may have ____________ as part of its name.

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The type of fibers specialized to continue contracting for extended periods of time,as would be required in running a marathon,for example,are _____ fibers.


A) fast
B) slow
C) intermediate
D) fast and intermediate
E) slow and intermediate

F) A) and B)
G) A) and D)

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Smooth muscle tissue is found in the organs of the digestive tract,the walls of blood vessels,and the iris.

A) True
B) False

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Which is not a protein found in thin filaments?


A) Actin
B) Troponin
C) Tropomyosin
D) Sarcomyosin
E) No exceptions;all are found in thin filaments.

F) A) and B)
G) B) and D)

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Each skeletal muscle is composed of _____________,which are bundles of muscle fibers.

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