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Muscles
| Question | Answer |
|---|---|
| Buccinator(O,I,F) | O: maxillary I:orbicularis oris F:compresses cheeks |
| Masseter(O,I,F) | O: zygomatic arch I: mandible F: elevates mandible |
| Sternocleidomastoid(O,I,F) | O:sternum and calvicle I:mastoid region of skull F:flex neck(neck bends/turns) |
| Rectus Abdominis(O,I,F) | o: pubis symphysis I:costal cartilage (rib 5-7) and xiphoid process F: depresses ribs, flexes vertebral column |
| Deltoid(O,I,F) | O:calvicle and scapula I: humerus F: abduction at shoulder |
| Gastrocnemius(O,I,F) | O:femoral condyles I:calcaneous F: plantar flexion, inversion/adduction/flexion |
| Soleus(O,I,F) | O: fibula/tibia I:calcaneous F:palntar flexion, adduction |
| Biceps Brachii(O,I,F) | O:scapula I:radius/ulna F:flexor of antebrachium |
| Brachialis(O,I,F) | O:radius I:ulna F:flexor of lower forearm |
| Quadriceps femoris(O,I,F) | O:patella I:tibia F:extend hind limb |
| Rectus femoris(O,I,F) | O:ilium I:illiac spine F:hip flexion and knee extension |
| Vastus Lateralis(O,I,F) | O:femur I:patella F:expands knee joint |
| Vastus Medialis(O,I,F) | O: femur I:patella, F:extends leg |
| Vastus Intermediuss(O,I,F) | O: femur I:patella F:extends leg |
| Adductor Magnus(O,I,F) | O:pubis and ischium I:femur F:adduction and extension of hip |
| Pectineus(O,I,F) | O:pubis(ventral) I:femur F:flexion/adduction of thigh |
| Teres Major(O,I,F) | O:scapula I:humerus F:rorate and flex humerus |
| Teres Minor (O,I,F) | O:scapula I:tuberosity of humerus F:flexes shoulder |
| Subscapularis(O,I,F) | O:scapula I:proximal end of humerus F:adducts forelimb |
| Pectorals-ag | Latissimus Dorsi-ant |
| anterior deltoids-ag | posterior deltoids-ant |
| trapezius-ag | deltoids-ant |
| abdominals-ag | spinal erectors-ant |
| left external obliques-ag | right external obliques-ant |
| rectus femoris-ag | biceps femoris-ant |
| soleus-ag | gastrocnemius-ant |
| biceps-ag | triceps-ant |
| ct around whole muscle | epiphysium |
| ct around fascicles | perimysium |
| ct round muscle cell | endomysium |
| terminal cister | sac like regions of SR that house Ca |
| sacrolemma vs sacroplasm | lemma: plasma mem plasm: cytoplasm |
| Sacroplasmic reticulum | interconnectin tubules of endoplasmic reticulum that surround each myofibril |
| Triad | two terminal cisternae surrounding a t-tubule |
| t-tubule | passageway |
| myofibril | contains contractile filamnts withing skeletal muscle |
| thick vs thin filament | myosin-thick, actin-thin |
| powerstroke | flexing head of myosin |
| cross bridge | myosin heda and actin |
| actin | binding site for myosin cross bridge |
| which molecule covers binding site for cross bridge | troppomyosin |
| which molecule has a binding site for ca | troponin |
| which molecule must bind to cross bridge to disconnect w actin | ATP |
| binding of cross bridges prevents | back sliding |
| three roles of ATP | energize, active tranasport of ca, bind w myosin to disconnect w actin |
| what molecules is connected to z line | actin |
| condition where muscles become rigid after death-how | rigor mortis-ca no longer moving so muscles perm contracted |
| shapes/characteristics of muscles:skeletal, cardiac, smooth | Sk:elongated, multinuclei,striated C:branched,mononuclei,striated Sm:spindle,mononuclei, nonstriated |
| what creates straited appearrance | actin and mysosin shape and density diff |
| what band only contains thin filament | I band |
| what band only contain thick filament | H zone |
| what band contains thicka nd thin | A band |
| z lines connect to what filament | thin |
| m linee connect to what filament | thick |
| order of structre lg to sm | whole skeletal muscle, fascicle, muscle fiber, myofibril, sarcomere, myofilament(actina nd mysosin) |
| sarcomere | sm functional unit ofmyofibril |
| z line | at each end anchor for thin shaped like z |
| m line | middle achor for thick |
| a band | dark actin and myosin |
| i band | light actin |
| h zone | middle thick |
| actin | golbular resting, active site covereds by tropomyosin(long stranded protein that blocks active site) |
| myosin | >1 head tail and glob head |
| calcium | key to unlok active sites bind to troponin(holds tropomyosin in place) which changes shap so rotates and accepts ca |
| SFT | z lines closer, I bands smallr, H zon smaller, A bands sasme |
| neurotransmitter | release chem to change permeability |
| contraction cycle | 1) ca bind to troponin 2)cross bridge formed 3)powerstroke 4)cross bridge detaches 5)myosin reactivatd as braks ATP |
| short vs sustained | quick vs slow |
| functions of skeletal muscle | mvmt, posture, support, guard, maintain body temp |
| characteristics | exciteability: recieve/respond to stimuli contractility: shorten extensibility:lengthen eleasticity:return to normal |
| gross anatomy of single muscle fiber | bvs, ct, nerves, skedletal mt |
| isotonic contraction | tension increase, length changes(bicep curls) |
| isometric contraction | tension increase to point, no length change(wall sit) |
| muscle fatigue(types and cramps) | metaboolic:decrease atp, nervous:weak/insufficient signals cramps-stress, dehydration, decreasd mg and ca |
| quad muscles | rectus fmoris, vastic intrmediates, vastis medias, vastis lateralis |
| hamstrong muscles | biceps fmoris, semitendonosis, semimembranosis |
Created by:
Holly M
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