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SSCT Intro to A&P C7
SSCT Intro to Anantomy & Physiology Ch. 7
| Question | Answer |
|---|---|
| frontalis | elevates eyebrows; wrinkles forehead *forehead |
| orbicularis oris | closes mouth, shapes lips *bottom lip |
| orbicularis oculi | closes eye *eyebrow |
| platysma | depresses mandible, grimmace *under chin |
| masseter | elevates mandible *cheeks |
| temporalis | elevates mandible *temples |
| sternocleidomastoid | flexes neck *extends from behind ear to top of chest |
| rectus abdominus | compresses abdomen, flexes trunk *abdominal muscles |
| external oblique | compresses abdomen, rotates trunk *sides of abdomen |
| serratus anterior | protract scapula (pushing away, forward) *shoulder girdle muscle |
| trapezius | moves scapula, various ways *between shoulder & neck |
| pectoralis major | adducts shoulder *chest |
| latissimus dorsi | adducts shoulder *Back (back fat) |
| deltoid | abducts shoulder *shoulder |
| biceps brachii | flexes elbow *upper arm-front |
| triceps brachii | extend elbow *upper arm-back |
| flexor digitorum | flexes wrist & fingers *runs from wrist to elbow along the side of the arm. |
| extensor digitorum | extends wrist & fingers *runs from back of hand to elbow in the middle |
| rectus femoris | extend knee & flexes hip *runs from hip to knee in center |
| vastus lateralis | extend knee *runs from hip to knee on the outside of the thigh |
| vastus medialis | extend knee *runs from hip to knee on the inside of the thigh |
| vastus intermedius | extend knee * |
| biceps femoris | flex knee and extend hip, Hamstring muscle group, back of thigh-to the outside of the thigh, runs butt to knee |
| semitendinosus | flex knee and extend hip, hamstring muscle group *back of thigh-runs butt to knee toward the inside |
| semimembranosus | flex knee and extendd hip, Hamstring muscle group *back of thigh under biceps femoris |
| gluteus maximus | extends hip *butt |
| tibialis anterior | dorsiflexion of ankle *runs from knee to ankle in front of tibia |
| gastrocnemius | plantar flexes ankle *calf muscle |
| soleus | plantar flexes ankle *runs from front of tibia to ankle |
| Origin | attachment of a muscle to the bone that does not move when contraction occurs |
| Insertion | attachment of a muscle to the bone that it moves when contraction occurs |
| Tendon | bands or cords of fibrous connective tissue that attach a muscle to a bone or other structure |
| Isotonic Contraction | of the same tension or pressure |
| Isometric Contraction | type of muscle contraction in which muscle does not shorten |
| Contraction | ability of muscle cells to shorten or contract |
| Twitch | a quick jerky response to a single stimulus |
| Tetanic Contraction | Sustained contraction (tetanus or tetany) |
| Flexion | act of bending decreasing the angle between two bones at the joint |
| Extension | increasing the angle between two bones at a joint |
| abduction | moving a part away from the midline |
| adduction | moving a part toward the midline |
| rotation | movement around a longitudal axis |
| supination | to turn the palm of the hand upward |
| pronation | to turn the palm downward |
| Dorsiflexion | when the top of the foot is elevated with toes pointing upward |
| plantar flexion | action of the bottom of the foot being directed downward (allows a person to stand on their toes) |
Created by:
dmdisme
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