Intro to Skeletal Muscles

Question 1

Are skeletal muscles voluntary or involuntary?

Answer 1

voluntary but some are involuntary with reflexes

Question 2

skeletal muscle characteristics

Answer 2

multinucleate, striated, long/cylindrical, run parallel

Question 3

Are smooth muscles voluntary or involuntary?

Answer 3

involuntary

Question 4

smooth muscle characteristics

Answer 4

single central nucleus, short, spindle shape

Question 5

where are skeletal muscles found?

Answer 5

attached to bones

Question 6

where are smooth muscles found?

Answer 6

found in hallow organs

Question 7

Are cardiac muscles voluntary or involuntary?

Answer 7

involuntary

Question 8

cardiac muscle characteristics

Answer 8

rectangular, straited, short fibers, one nucleus per cell

Question 9

where are cardiac muscles found?

Answer 9

heart

Question 10

Muscles are derived from what?

Answer 10

mesenchymal cells

Question 11

fasciculus

Answer 11

small bundle of nerve, muscle or tendon fibers

Question 12

what innervates all muscles?

Answer 12

spinal nerves

Question 13

muscle body is also know as

Answer 13

belly

Question 14

aponeurosis

Answer 14

thin sheath of connective tissue that helps connect your muscles to bones

Question 15

long skeletal muscles movement and contraction

Answer 15

wide movement, small force of contraction

Question 16

short skeletal muscles movement and contraction

Answer 16

shore range of movement, high force of contraction

Question 17

attachment to stationary end of muscle

Answer 17

origin

Question 18

attachment to mobile end of muscle

Answer 18

insertion

Question 19

types of skeletal muscles

Answer 19

red and white

Question 20

muscle fiber directions

Answer 20

parallel, pennate, unipennate, bipennate, multipennate, spiral, cruciate

Question 21

parallel muscles

Answer 21

long, parallel to the line of pull with wide range of movement

Question 22

pennate muscles

Answer 22

short, oblique to line of pull

Question 23

unipennate

Answer 23

one side of the tendon

Question 24

bipennate

Answer 24

two sides of the tendon

Question 25

multipennate

Answer 25

series of bipinnate muscles

Question 26

spiral muscles

Answer 26

twisted fibers

Question 27

cruciate muscles

Answer 27

superficial and deep plane

Question 28

spurt muscles

Answer 28

acceleration movement. originate away, insert close

Question 29

shunt muscles

Answer 29

stabilizing. originate near insert away

Question 30

spurt muscle force of contraction

Answer 30

force of contraction across the bone

Question 31

shunt muscle force of contraction

Answer 31

force of contraction along the bone

Question 32

fasciae

Answer 32

connective tissue that forms attachment for muscles

Question 33

platysma muscle

Answer 33

sheet of skeletal muscle attached to skin of neck and head

Question 34

platysma muscle origin

Answer 34

dorsal raphe of neck

Question 35

platysma muscle insertion

Answer 35

cheek and commissure of labia

Question 36

platysma muscle action

Answer 36

draws lips caudad

Question 37

platysma muscle innervation

Answer 37

facial nerve

Question 38

cutaneus trunk muscle

Answer 38

sheet of skeletal muscle attached to skin of thorax and abdomen

Question 39

cutaneus trunk muscle origin

Answer 39

superficial fascia of trunk

Question 40

cutaneus trunk muscle insertion

Answer 40

caudal border of deep pectoral muscle and fascia of medial brachium

Question 41

cutaneus trunk muscle action

Answer 41

twitch of skin

Question 42

cutaneus trunk muscle innervation

Answer 42

lateral thoracic nerve