A & P Exam 2 Review Muscle Tissue

Front 1

which are considered specific characteristics of all muscle cells

Back 1

a.b.c.d

contractility

extensibility

excitability

elasticity

Front 2

which are possible functions of skeletal muscles

Back 2

a.b.c.d.e

Front 3

which is a correct listing of the hierarchy of a skeletal muscle's components, beginning with the smallest

Back 3

a.b.c.d

myofibrils

muscle fiber

fascicle

skeletal muscle

Front 4

what is the letter associated with the dark bands in a sarcomere

Back 4

A

Front 5

which letter is associated with the line that is a thin protein structure in the center of a band and serves as an attachment site for thin filament ends?

Back 5

Z

Front 6

which incorrectly describes what happens during skeletal muscle contraction

Back 6

the Z discs of a sarcomere move farter apart

Front 7

the calcium ions involved in skeletal muscles contractions bind to a _____ subunit

Back 7

troponin

Front 8

which sequence correctly lists the changes that allow the thick and thin filaments to slide past one another in skeletal muscle contraction

Back 8

attach-pivot-detach-return

Front 9

which is the neurotransmitter that causes the release of calcium ions and initiates the steps of skeletal muscle fiber contraction

Back 9

acetylcholine

Front 10

when a muscle is isometrically contracted, its length ______ change

Back 10

does not

Front 11

which contraction occurs when you try (unsuccessfully) to move a wall?

Back 11

isometric

Front 12

which may occur as a result of muscle atrophy

Back 12

all of the choices

Front 13

the resistance to fatigue of fast fibers is _____ when compared to that of slow or intermediate fibers.

Back 13

Low

Front 14

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

Back 14

slow

Front 15

the vascular supply to slow muscle fibers is ____ the network of capillaries around fast muscle fibers.

Back 15

more extensive than

Front 16

which fibers dominate many of the back and calf muscles that contract almost continually to maintain posture

Back 16

slow

Front 17

pennate muscles resemble a _____

Back 17

feather

Front 18

the biceps brachia is an example of a ___ muscle

Back 18

Parallel

Front 19

the type of lever with the fulcrum in the middle is a ______ lever

Back 19

first class

Front 20

when the force is applied between the resistance and the fulcrum, the result is a ______ lever

Back 20

third class

Front 21

when the muscles on the posterior side of the head pull on the skull and oppose the tendency of the head to tip anteriorly, one has an example a ____ lever

Back 21

first class

Front 22

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

Back 22

cardiac

Front 23

the type of muscle fibers that have only a single nucleus both thick and thin filaments, but no Z discs are

Back 23

Smooth

Front 24

a term that could be used to describe the changes that occur in muscle fibers as humans age would be _____

Back 24

atrophy

Front 25

this sarcomere depicts relaxed muscle. the M line is noted by number

Back 25

4