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ANS 214L Lab 6
Skeletal Muscles of the Pig
| Question | Answer |
|---|---|
| hypo- | under,less |
| infra- | below |
| inter- | between |
| -lemma | sheath,or husk |
| mega-,megalo- | large |
| Myo- | Muscle |
| post- | after |
| semi- | half |
| supra- | above |
| striation of smooth muscle | none |
| contraction of smooth muscle | involuntary |
| location of smooth muscle | GI, reproductive, ureters, blood vessels |
| arrangement of smooth muscle | circular and longitudinal layers, individual cells |
| nucleus of smooth muscle | single nucleus, centrally located |
| striation of cardiac muscle | yes |
| contraction on cardiac muscle | involuntary |
| location of cardiac muscle | heart |
| nucleus of cardiac muscle | 1, 2, or 3 nuclei, centrally located. majority become binucleated within a few weeks of life |
| striation of skeletal muscle | yes |
| contraction of skeletal muscle | voluntary |
| location of skeletal muscle | attached to bones |
| arrangement of skeletal muscle | longitudinal layers, elongated cells=muscle fibers |
| nucleus of skeletal muscle | mulinucleated, peripherally located |
| peristalsis | progressive alternating wave of coordinated contraction and relaxation of smooth muscle. result-movement of material |
| segmentation | stationary rhythmic contraction and relaxation of circular intestinal smooth muscle. result-mixing |
| functions of the skeletal muscle | maintain posture (hold the body erect), movement |
| what muscle is located on the back of the scapula? | supraspinatus |
| Biceps femoris | on lateral part of hind leg |
| Cutaneous trunci | directly under skin, horizontal striations, and is usually separated with the skin |
| Gastrocnemius | in the middle of the hind leg and contracts when you move leg |
| Gluteus group | located anterior of tail and is dark pink in color |
| Gracilis | on the medial part of the hind leg and is a thin sheet |
| Infraspinatus | below the scapula ridge |
| Latissimus dorsi | located caudal of the shoulder and the striations fan out caudal/dorsal |
| Longissiums | runs along the exterior of the spine |
| Obliquus externus abdominis | located lateral of rectus abdominis and striations run diagonally cranial/dorsal |
| Pectorales profundi | wraps around the medial part of front legs |
| Quadriceps femoris | located near stifle on cranial part of the hind leg |
| Rectus abdominis | located in the stomach region, your "abs" |
| Semimembranosus | located on inner leg, lateral to Gracilis |
| Semitendinosus | located on caudal part of hind leg, below the tail, and it is tendon like |
| Serratus ventralis | medial, beneath the Latissimus dorsi, large white lines make it look like "knuckles" or "serrated" |
| Supraspinatus | located in front of the scapula ridge |
| Trapezius | located dorsal of the shoulder and looks like a large dark triangle |
| Triceps group | located on caudal part of the front leg |
| Subscapularis | located on the back of the scapula |
| Psoas major | begins at the medial surface caudal to the last rib and ventral to the vertebrae |