2004_Muscle - BIOMSO’? Muscle Physiology E-l Student Test...

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Unformatted text preview: BIOMSO’? Muscle Physiology E-l Student Test Report On Examl 1 A Course #: BIOM507 Instructor: Dr. Greene Course Title: BIOMSO7 Physiology Description: Muscle Physiology Day/Time: 3/15/04 Tenn/Y ear: Term 3 Student Name: Student ID: - Possible Pts. Raw Response (dash> correct response <#> multiple marks <$pace> no response Description: <aiphabet> student's incorrect reSponse <*> bonus test item Test Items: TestKey: E,A,A.D,E D,A,#,#,B Answers '— ' fl Remarksfluestions #13 and 14 ABCDE accepted. Directions Questions 1—17: Select the BEST answer and lblacken the appropriate 'ace on the answer sheet. Use the diagram betow to answer'questions f and 2 g}, ' / 23M“ - 1. Which of the following statements are correct? This is a. polysynapticireflex . ‘9 epolarizatior; in the structure labeled 5 signals changes occurring in roprioceptor )fiQti'jAs a. result of the stimuli applied at V, the involved muscie Vl relaxes “fag-Ill represents the calf body of a sensory neuron one of the above ' W K we?” 2- Which of the following statements are correct? a. The reflex in the diagram cannot be affected by CNS structures located above the Spinal cord _ Depolarization in the structure labeled I signals changes occurring in a go gi tendon organ 4 The structure labeled It represents a gamma efferent fiber fthe spinal cord were transected one level above the site shown in ' is diagram this reflex could still occur 9. none of the above Use the diagram below to answer questions 3 and 4. glfit/WL _. fifths portion of the recording . ' - _ _‘ also I shows the response of th d namic nuctear bag (Ibers during . *’ r “ id'str'etching. ' ' ‘ ' - ~ "' 4““ fiabeled -I shows the response of the static nuclear chain fibers during id stretching - c. labeled It indicates that release of the stretched spindle has the same as rapid stretching on both types of spindle fiber responses lab led ll indicates that the brain has no feedback to indicate the positi n of the moscle in space during this period of time e. N e of the above The reason why there is no response in either typicfigigggegduring the seleiaseportiongzg tendon tag is. that m“ a. a tendon tap does not res'utt in stretching of the attached muscle b. the muscie does not relax c. the muscle does not. contract @the fibers are not sensitive enough to respond to such a brief event 9. a very heavy hammer must have been used Use the diagrams below to answer questions 5 and 6. Bill 2 iatii} 2 5. The greatest number of cross-bridges can be fanned when the length of a muscle is in the range indicated by these numbers prior to being stimulated to contract: '9 a. 2 and 1 b. 5 and 4 an. 9 , d: 3' and 2 Active Tension Sarcnmere Length A 6. Th sarcomere shown in B (ii) @would- be located in the range between 2 and 1 . has too much myosin overlapping to allow for maximal cross-bridge formation _ c. would not be able to develop maximal. active tension because calcinim release would. be blocked d. is. at its optimal resting length to develop active tension when the muscle is. stimulated 9. None of the above Use the diagram below to answer questions 7 and 8 7. Movement of the lower arm ih the direction of the arrow would result in the following: _ a. There w0uld' bean increase in firing of the nerve labeled l b. There would be an increase in firing of the nerve labeled II he mnecle would relax . The golgi tendon organ would be stimulated asset None of the above 1‘?" ,. 8. A signal through the nerve labeled I! would result in a. relaxation of the muscle contraCtion of the muscle . flexing of the lower arm d. a monosynaptic reflex e- none of the above 9. A muscle spindle can become more excitable by a. stretching the whole muscle. or decreasing the gamma gain b. contracting the whole muscle or decreasing the gamma gain . contracting the whole muscle or increasing the gamma gain stretching the whole muscle or increasing the gamma gain a. none of the above Select the best lettered choice to answer questions 10-12. (An answer may be used more than once) a. Skeletatifiauscle b. smooth muscle 0. cardiac muscle d. smooth and cardiac muscle 9. cardiac, skeletal, and smooth muscle 10. Has the properties of conductivity and excitability @ ' 1?. Ability to contra t spontaneously _ ‘” “L” '“ 3e 12. Controlled entirely through innervation @ Use the following diagram to answer Questions 13 and 14 .. (Slew: ‘ at“ 5% $553; 5532:?- as HWijle 13. In comparison to the other fiber types, the fiber type labeied t a. is more resistant to fatigue b. has a high capacity for aerobic activity a is Utilized most often during exercise of light intensity d. has a fast speed of contraction e. none of the above 14. In comparison to the other fiber types, the fiber type labeled It a. is least resistant to fatigue . is recruited during periods of intense exercise c. has the highest capacity for aerobic activity d. is easily fatigued e. none of the above Use the following diagram to answer question 15 15. The curved line in the tracing above represents a. an electrical event ® a mechanical event c. a ane of membrane depoiarization d. an action potential e. none of the above J ,\ e92 9 e Usethe diagrams below to choose the best ans er questions 16 and 17. RWY ‘ w we a s) w"? ’ g: _ - V \ J) 3° ‘5 it! fill» m 140 man-=3 1m. §~ 16. A single muscle twitch w. W A. A}. r ,, W h a. is represented in figure I b. is represented in figure II 0 c. is represented in both figures '5'"- ee:-_ . o-r " 7 ‘- @ none of the above o W 1 7. The latent period \ a. is determined by the degree of internal shortening that must take place before a contraction can be measured outside the muscle J ...
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2004_Muscle - BIOMSO’? Muscle Physiology E-l Student Test...

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