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muscles a&p exam4
ap exam 4 hoffmann
| Question | Answer |
|---|---|
| Trapezius | post neck, shrug shoulders, rope pull |
| Ext. Oblique | abs, flexes vertebrae |
| orbicularis oris | mouth, kissing |
| deltoid | upper arm, adducts arm |
| pec. mjor | chest, adducts arm |
| gracilis | medial thigh, adduct thigh at hip |
| biceps femoris | posterior thigh, hip extension, knee flexion |
| biceps brachii | arm, flexion of forearm @ elbow |
| buccinators | cheeks, sucking, blowing, whistling |
| depressor anguli oris | mouth, open mouth |
| platysma | neck, mandible, pouting |
| masseter | cheek, chewing |
| diaphragm | breathing, moves no bones |
| serratus anterior | lateral ribs, boxer's muscle |
| adductor longus | medial thigh, adducts thigh, flexion of thigh @ hip |
| sartorius | ant thigh, flexes leg @ knee |
| internal oblique | abs, flexes vert |
| occipitofrontalis | forehead, wrinkles, raises lowers eyebrows |
| genioglossus | tongue, protracts tongue |
| zygomaticus | cheek, smiling |
| orbicularis oculi | closes eye |
| levator palebrae superioris | opens the eye |
| styloglossus | tongue, retracts tongue |
| semispinalis captis | back of neck, rotate and extend head |
| transverse abdominus | abs, compresses abdomen, holds guts in, ** does not flex vertebrae |
| rectus abdominus | abs, compress abd, flex vert |
| ext. intercostals | ribs, inhalation |
| pectoralis minor | chest, force inhalation |
| latissimus dorsi | swimmers muscle, rotates arm @ shoulder |
| triceps brachii | post arm, extend forearm @ elbow |
| psoas major | hip, vertebrae, flex and extend @ hip |
| gluteus max | butt, extend thigh @ hip |
| quadriceps femoris | ant thigh, all 4 heads extend leg |
| semitendinosous | post thigh, one of hamstrings, flexes @ knee |
| semimembranosous | post thigh, one of hamstrings, flexes @ knee |
| Smooth | Involuntary, makes up GI tract |
| Skeletal | Striated, voluntary, moves bones |
| Cardiac | Involuntary, striated, branched fibers |
| 4 Characteristics of Muscle Tissue | 1.Excitability 2. Contractility 3.Extensibility 4.Elasticity |
| Tendon | attach muscle to bone, bundles |
| Aponeurosis | attach muscle to bone, flat sheet |
| Muscles require an AP to contract (T/F) | T |
| Actin is part of a thick filament (T/F) | F |
| ATP attaches to myosin during the contraction process t/f | T |
| When an AP occurs it cz sodium channels to open on the surface of a muscle t/f | T |
| During contraction, actin and myosin fibers shorten t/f | F |
| AcH is a chemical which cz muscles to produce an AP | T |
| The muscles of the face do not move bones t/f | F |
| The SCM can turn your head t/f | T |
| The Orbicularis Oculi opens the eye t/f | F |
| The quadriceps femoris affects 4 bones t/f | F |
| The Biceps Brachii is the only muscle that flexes the forearm t/f | F |
| The quadriceps femoris extends the leg at the knee t/f | T |
| The Biceps Femoris, Semitendinosous, and Semimembranosous muscles are known as the Hamstrings t/f | T |
| The Gastrocnemius has the longest tendon in the body t/f | T **** but need to double check, most sources say Plantaris |
| Frontalis muscle cz wrinkles on the forehead t/f | T |
| The diaphragm does not move bones t/f | T |
| the deltoid is a shoulder muscle which moves the humerus t/f | T |
| most facial muscles move bones of the face t/f | F |
| Flexion cz the angle btwn 2 bones to dcrease t/f | T |
| Abduction brings an arm or leg closer to midline t/f | F |
| Frontalis muscle is on forehead and when it contracts is cz forehead to wrinkle t/f | T |
| In order to produce movement at a joint muscles have to work in antagonistic pairs t/f | T |
| The hamstrings are made of 3 muscles on post. thigh, a help bend leg at knee t/f | T |
| the rectus femoris is found on the back of the thigh t/f | F |
| An isotonic contraction cz one or more bones to move t/f | T |
| when you kiss someone the orbicularis oris is contracting t/f | T |
| flexing your leg at the hip requires the quadriceps femoris to contract t/f | F |
| muscles have the ability to stretch while contracting, this is extensibility t/f | T |
| cardiac muscle is found only in the heart t/f | T |
| the zygomaticus muscle helps you smile t/f | T |
| An antagonist works with the prime mover muscle t/f | F |
| The levator palpebrae superioris closes the eye t/f | F |
| the Latissimus dorsi is often referred to a the swimmers muscle t/f | T |
| skeletal muscle is striated and voluntary t/f | T |
| Your platysma is on your chin / neck and helps you pout t/f | T |
| Flexion (Def) | Decrease angle btwn 2 bones |
| Extension (Def) | Increase angle btwn 2 bones |
| abduction (Def) | away from midline |
| adduction (def) | toward midline |
| Neurons stimulate muscle contraction by releasing what substance to cz and action potential? | AcH |
Created by:
bizziegold
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