An&Phy3

A skeletal muscle cell can be several inches long. The property of muscle tissue that allows an impulse to travel down the entire length of the cell membrane is:  

• elasticity.

• conductivity.

• extensibility.

• contractility.

The spring-like property that returns muscle to its original length after a contraction ends is:  

• extensibility.

• elasticity.

• contractility.

• conductivity.

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, b, c, d

• a, c, b, d

• d, c, b, a

• c, b, a, d

Which is the correct order of the connective tissue layers of a skeletal muscle, beginning with the outermost first?
a: Endomysium
b: Epimysium
c: Perimysium  

• a, b, c

• b, a, c

• c, a, b

• b, c, a

The structure responsible for attaching muscle to bone is a:  

• ligament.

• fascia.

• tendon.

• myofibril.

Which protein makes up the thick filaments?  

• Myosin

• Actin

• Tropomyosin

• Troponin

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

• Z disc

• I band

• H zone

• A band

In the limbs, which tends to be a muscle's more distal attachment?  

• The aponeurosis

• The Insertion

• The origin

• The perimysium

The deepest of the abdominal muscles are the _________ muscles.  

• rectus abdominis

• transversus abdominis

• internal oblique

• external oblique

Which muscle forms the traditional “six-pack” of a well-toned abdominal wall?  

• Rectus abdominis

• Internal oblique

• Transversus abdominis

• External oblique