Category: Uncategorized

  TOTAL QUESTION 4 [12]

1.    Name the connective tissue coverings of a skeletal muscle, from superficial to deep? a.    endomysium . . . perimysium . . . epimysiumb.    endomysium . . . epimysium . . . perimysiumc.    perimysium . . . epimysium . . . endomysiumd.    epimysium . . . endomysium . . . perimysiume.    epimysium . . . perimysium . . . endomysium  

7.  Which organ below does NOT contain muscle fibers? a.    cardiac muscleb.    skeletal musclec.    striated muscled.    smooth musclee.    tendons

27.    What SM division of the nervous system controls voluntary contractions of the skeletal muscles? a.    sympathetic division of the autonomic nervous system (VM)b.    parasympathetic division of the autonomic nervous system (VM)c.    visceral motor division nervous system (VM)d.    somatic sensory division of the peripheral nervous system (SS)e.    somatic motor division of the peripheral nervous system (SM)  

29. Substances within nerve cells that are abnormally transported backwards from an axonal terminal to the cell body of the same neuron, are delivered by? a.    anterograde or normal flowb.    reverse flowc.    axoplasmic transportd.    retrograde flowe.    b and d

8.  What tunnel shaped part of the skeletal muscle cell carries action potentials (nerve impulses)      from the cell  membrane, to the sarcoplasmic reticulum? a.    sarcoplasmab.    sarcolemmac.    sarcomered.    t-tubules or transverse tubulese.    myoneural junction

9.  Based on the choices below, what is the correct order of events that occurs in muscle      contraction? a.    pivoting heads, ATP caused detachment, relaxation, attachment cross bridgingb.    ATP caused detachment, pivoting heads, attachment cross bridging, relaxationc.    attachment cross bridging, pivoting heads, ATP caused detachment, relaxationd.    attachment cross bridging, pivoting heads, relaxation, ATP caused detachmente.    pivoting heads,  attachment cross bridging, relaxation, ATP caused detachment  

5.  An action potential and ion transfer can travel quickly from one cardiac muscle cell to another      because of the presence of? a.    desmosomes & gap junctionsb.    fast fibers & desmosomesc.    tight junctions & intercalated discsd.    gap junctions & intercalated discs e.    hemidesmosomes & intercalated discs  

34.    If the resting membrane potential is – 70 mV and the threshold is – 55 mV, a membrane of – 60 mV, will do what? a.    produce an action potentialb.    hyperpolarize the membranec.    make it easier to produce an action potentiald.    make it harder to produce an action potentiale.    a and b  

17. Botulism toxin is a weapon of mass destruction that prevents release of acetylcholine at the        synaptic terminal  MNJ.  How does this toxin affect muscular activity? a.    causes spastic paralysis due to continuous stimulation of muscleb.    it has no effect on muscle contractionc.    causes spastic paralysis due to continuous relaxation of muscled.    causes flaccid paralysis due to inability of muscle to contracte.    causes an continuous release of ACH at the MNJ