1 A) fascia B) an aponeurosis C) a tendon sheath D) a broad ligament 2 A) perimysium B) endomysium C) epimysium D) elastin 3 A) Another term for a skeletal muscle cell is muscle fiber. B) Each skeletal muscle cell has one nucleus and mitochondrion. C) The muscle cell membrane is called the sarcoplasm. D) Skeletal muscle cells never extend the full length of a muscle. 4 A) I bands B) Z bands C) H zones D) A bands 5 A) A band to A band B) M line to M line C) H zone to H zone D) Z line to Z line 6 A) many nuclei B) synaptic vesicles C) abundant mitochondria D) a cleft between the end and the muscle fiber 7 A) shortening of the muscle fiber B) creation of a high energy bond C) membrane polarization D) release of acetylcholine 8 A) the globular portion of the myosin filament B) the actin filament helix C) transverse tubules D) muscle cell cytoplasm 9 A) the number of synaptic vesicles increases B) muscle fibers stretch C) calcium ions move out of the cytoplasm of the neuron D) acetylcholine is released 10 A) hypertrophy B) atrophy C) dystrophy D) mystrophy 11 A) aerobic respiration B) increased metabolism of glucose C) anaerobic respiration D) increased blood supply 12 A) lowering of pH due to lactic acid build-up B) interruption of blood supply C) formation of a cramp D) lack of acetylcholine 13 A) level of stimulation delivered to individual muscle fibers B) number of fibers that respond in each motor unit C) number of motor units receiving a threshold stimulus D) latent period 14 A) hypotonic contraction B) sustained tetanic contraction C) muscle tone D) muscle hypertrophy 15 A) a state of sustained, partial contraction that certain muscles maintain, particularly the postural muscles B) a feeling of well-being following exercise C) the ability of a muscle to maintain contraction against an outside force D) the condition athletes attain after intensive training 16 A) some are responsive to hormones B) contraction is triggered by an influx of calcium ions C) stimulation by acetylcholine or norepinephrine D) highly organized arrangement of actin and myosin filaments 17 A) excitability B) automaticity C) rhythmicity D) lack of innervation 18 A) increased amounts of neurotransmitters B) the presence of striated muscle fibers C) intercalated disks between muscle fibers D) the property of excitability 19 A) antagonists B) synergists C) potentiators D) agonists 20 A) are always located on the same side of the body as the prime mover B) have different speeds and strengths of contraction C) produce extension rather than abduction D) perform movements opposite to those performed by the prime mover 21 A) maxilla B) mandibular process of the temporal bone C) zygomatic bone D) mandible 22 A) orbicularis oris B) epicranius C) platysma D) buccinator 23 A) rectus femoris B) semitendinosus C) semimembranosus D) biceps femoris 24 A) anterior surface of the sternum B) mastoid process of the temporal bone C) occipital bone D) spinous processes of the lower cervical vertebrae 25 A) internal oblique B) biceps brachii C) biceps femoris D) triceps brachii 26 A) biceps brachii B) deltoid C) infraspinatus D) supraspinatus 27 A) fibularis longus B) fibularis tertius C) tibialis anterior D) extensor digitorum longus 28 A) True B) False 29 A) True B) False 30 A) True B) False 31 A) True B) False 32 A) True B) False 33 A) True B) False 34 A) True B) False 35 A) True B) False 36 A) True B) False 37 A) True B) False 38 A) True B) False 39 A) True B) False 40 A) True B) False 41 A) True B) False
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