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Date Created: 11/14/15
Week Four Quiz 1 NSCl280 Version 5 University of Phoenix Material Week Four Quiz Chapter 9 Muscular System Histology and Physiology 1 Which of the following is NOT a function of skeletal muscle 9095 body movement maintenance of posture respiration production of heat 2 Which of the following is true 9069 Skeletal muscle is capable of spontaneous contraction Cardiac muscle cells have multiple nuclei Smooth muscle cells are long and cylindrical Week Four Quiz 2 NSCl280 Version 5 e There is a small amount of smooth muscle in the heart Which type of muscle tissue has cells that branch skeletal muscle smooth muscle both skeletal and cardiac muscle both cardiac and smooth muscle 9095 Hypertrophy of skeletal muscles from weight lifting is caused by an increase in the number of muscle fibers number of striations number of nuclei within the muscle fibers number of muscle cells 99065 Actin myofilaments a resemble bundles of minute golf clubs 9903 Week Four Quiz 3 NSCl280 Version 5 contain both myosin and tropomyosin are held in place by the M line are the thickest proteins in muscle 6 When an action potential reaches the presynaptic terminal 9906 calcium ions diffuse into the presynaptic terminal through voltagegated ion channels a local potential is generated in the presynaptic terminal ligandgated ion channels in the presynaptic terminal are opened nothing else happens 7 In excitationcontraction coupling a b c calcium ions must bind with myosin to expose active sites on actin crossbridges form between myosin heads and calcium ions d e Week Four Quiz NSCl280 Version 5 movement of the troponintropomyosin complex causes actin myofilaments to slide ATP binds to actin myofilaments 8 Which of the following helps explain the increased tension seen in multiple wave summation 9095 increased motor unit recruitment exposure of more active sites on myosin myofilaments the breakdown of elastic elements in the cell decreased stimulus frequency 9 An isotonic contraction is described as 9903 action potential frequency is high enough that no relaxation of muscle fibers occurs a muscle produces an increasing tension during contraction a muscle produces increasing tension as it shortens a muscle produces tension but the length of the muscle is increasing 10 Which type of respiration occurs in the mitochondria 4 Week Four Quiz 5 NSCl280 Version 5 a anaerobic respiration I0 0 both anaerobic and aerobic respiration Chapter 10 Muscular System Gross Anatomy Week Four Quiz NSCl280 Version 5 The sternocleidomastoid muscle extends from the mastoid process of the temporal bone to the sternum and medial clavicle When both sternocleidomastoid muscles contract the head is flexed The end of the muscle that connects to the sternum is the a b belly 0 body d insertion e fixator Which of the following represents a class I lever system crossing your legs standing on your tiptoes flexion of the elbow to elevate the hand lifting weight with your arm 9095 In order to stabilize the hyoid so that the larynx can be elevated in swallowing the muscle group is used a Pterygoid b Infrahyoid c Auricularis d e hyoglossus If abdominal muscles are contracted while the vertebral column is fixed this will aid in a vomiting b childbirth c urination d defecation e 6 Week Four Quiz NSCl280 Version 5 5 Which muscle will depress the scapula or elevate the ribs 9095 6 Which of the following muscles extends the forearm and has its insertion on the ulna 9095 levator scapulae pectoralis minor subclavius rhomboideus major Deltoid biceps brachii brachialis coracobrachialis 7 The gluteus maximus 9095 8 Label muscle quotAquot on the A diagram 39 9095 does most of the work in quotsitupsquot allows one to sit crosslegged is used in the kneejerk reflex is a common site for injections m 121 rtanx la rccrgJJ zr ct can39t if h F39tr39 L Occipitolnointal is frontal portion E ilg39i iciirrilgator supercilii Zuzana C 39rc39 391 EZrcwlihlh can Superior Procerus orblcularls OCUII Auric ularis iLev atDr lab superioris anterior aiaeq39ue n asi A r J H a 7 Levaslor l abii trapeZIus pgglggig S 7 superioris sternocleidomastoid z iigamaiicus quotWWquot 7 539 Zygomaticus mayor masseter i Orbiculariisoris occipital Mentaliiis portion Depress or labii inferioris 39 Depressor anguli oris Levator angiuli Iris 7 Flisoriuslcut iB Buccinator 7 9 Label muscle quotAquot on the diagram a linea alba b c rectus abdominis d external oblique e internal oblique 10 What does quotAquot represent 9095 Coracobrachialis pectoralis major biceps brachii serratus anterior Week Four Quiz 8 NSCl280 Version 5 C cs39wgfil c c MiriamMI Cc mnzs h Fir n sum remit2 I m if fl JClCl iii mice iLatissimus Pectoraliis major Hectus dorsi k 39 abdominis i3 covered by A a i sheath 1 r f f E 7 D i Linea I 739 semilunaris a Ext Ernal 7 a abdominal quotiiff i u i I i quot139 w i i i i 4 Transversus lilac crest w J i r v abdominis inguinal quot i i 3 ligament mgumama nal iTerrdimousintersection Deltoid out a Anterior view
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