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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  

25. Muscle hypertrophy is muscle enlargement where the diameter of muscle fiber increases.   Which statement below, regarding muscle hypertrophy, is FALSE? a.    number of myofilaments made up of actin & myosin in hypertrophied muscle increase b.    hypertrophied muscles have more mitochondriac.    hypertrophy muscles have larger glycogen reservesd.    number of muscle fibers or muscle cells increase in hypertrophye.    number of thick and thin filaments increases

28.    Smooth muscle, cardiac muscle, visceral organs & glands are effectors or targets of the? a.    automatic nervous systemb.    somatic nervous systemc.    autonomic nervous systemd.    sensory or afferent division of the PNSe.    CNS

21. A myogram is a graph of tension in muscle fibers. What is the correct order of       occurrence,  of the myogram phases, from pre-stimulation to post-stimulation? a.    latent period, relaxation phase, resting phase, stimulus, contraction phaseb.    latent period, resting phase, stimulus, contraction phase, relaxation phasec.    resting phase, latent period, stimulus, contraction phase, relaxation phased.    resting phase, stimulus, latent period, contraction phase, relaxation phasee.    stimulus, resting phase, latent phase, contraction phase, relaxation phase  

6.   What happens when contraction occurs in skeletal muscle? (Choices may have changed       from study guide) a.    the H zone gets largerb.    the Z lines move farther apartc.    the width of the A band gets thicker & shorterd.    cross-bridging attachment & pivoting of filaments occurse.    all of the above occur