Lab 4 - Skeletal Muscles

Question 1

Muscles are comprised of what tissue?

Answer 1

Contractile tissue that assists in the movement of the body and organ

Question 2

What are the 3 types of muscle?

Answer 2

Smooth
Cardiac
Skeletal

Question 3

What is Smooth muscle?

Answer 3

Not striated
Involuntary
Found in GI, reproductive, ureters, and Blood vessels
Is circular and longitudinal
A single Nucleus that is centrally located

Question 4

What is the Cardiac Muscle?

Answer 4

Is striated
Involuntary
ONLY found in the HEART
Cells connected by intercalated discs
1 or 2 nuclei

Question 5

What is Skeletal Muscle?

Answer 5

Is Striated
Voluntary
Attached to bones
Longitudinal layers/ elongated cells
Multinucleated/ located to the side of cells

Question 6

Smooth Muscle is involved in what 2 special types of contractions?

Answer 6

Peristalsis and Segmentation

Question 7

What is Peristalsis?

Answer 7

movement of material

Question 8

What is Segmentation?

Answer 8

Stationary rhythmic contraction and relaxation of intestinal smooth muscle
Result is mixing

Question 9

What is the purpose of skeletal muscle?

Answer 9

Maintain posture
Movement

Question 10

What are the skeletal muscle attachments?

Answer 10

The Origin and Insertion

Question 11

What is the Origin?

Answer 11

The end of the muscle that is attached to a stationary part of bone

Question 12

What is the Insertion?

Answer 12

The end of the muscle that is attached to a mobile section of bone

Question 13

What is the Biceps femoris?

Answer 13

Located on the Lateral part of the hind leg

Question 14

What is the Cutaneous trunci?

Answer 14

Located directly under the skin, horizontal striations, and is separated from the skin
(Thoracic and Abdominal Cavity)

Question 15

What is the Gastrocnemius?

Answer 15

Located in the middle of the hind leg and contracts when you move the leg

Question 16

What is the Gluteus Group?

Answer 16

Located anterior of the tail and is dark pink in color

Question 17

What is the Gracilis?

Answer 17

Located on the medial part of the hind leg and is a thin sheet

Question 18

What is the Infraspinatus?

Answer 18

Located below the scapula ridge

Question 19

What is the Latissimus dorsi?

Answer 19

Located caudally of the shoulder and the striations fan out caudal/dorsal

Question 20

What is the Longissimus dorsi?

Answer 20

Runs along the exterior of the spine

Question 21

What is the Obliquus externus abdominis?

Answer 21

Located lateral of the rectus abdominis and striations run diagonally cranial/dorsal

Question 22

What is the Pextoralis profundi?

Answer 22

Wraps around the medial part of front legs

Question 23

What is the Quadriceps femoris?

Answer 23

Located near stifle on cranial part of the hind leg

Question 24

What is the Semimembranosus?

Answer 24

Located on the inner leg, lateral to Gracilis

Question 25

What is the Rectus abdominis?

Answer 25

Located on the stomach region (Abs)

Question 26

What is the Semitendinosus?

Answer 26

Located on caudal part of hind leg, below the tail, and is tendon like

Question 27

What is the Serratus ventralis?

Answer 27

Medial, beneath the latissimus dorsi, large white like make it look like knuckles

Question 28

What is the Supraspinatus?

Answer 28

Located in front of scapula ridge

Question 29

What is the Trapezius?

Answer 29

Located dorsal of the shoulder and looks like a large dark triangle

Question 30

What is the triceps group?

Answer 30

Located on caudal part of front leg - Subscapularis - Psoas major - Cutaneous trunci

Question 31

What is the Subcapularis?

Answer 31

Located on back of scapula

Question 32

What is the Psoas major?

Answer 32

Begins at medial surface caudal to the last rib and ventral to the vertebrae

Question 33

What is the Cutaneous trunci?

Answer 33

muscle layer that lines the skin seen after skinning the animal responsible for skin twitching reflexes

Question 34

infra-

Answer 34

below

Question 35

supra-

Answer 35

above

Question 36

inter-

Answer 36

between

Question 37

-lemma

Answer 37

sheath or husk

Question 38

mega-, megalo-

Answer 38

large

Question 39

myo-

Answer 39

muscle

Question 40

semi-

Answer 40

half