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Mixed Quiz
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1<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg:: ::/sites/dl/free/0072919264/63072/1101.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (13.0K)</a> What molecular complex is depicted above?
A)myosin
B)actin
C)intermediate fibers
D)Z discs


2The tropomyosin molecule in the above complex acts to:
A)bind to mysoin during muscle contraction
B)bind to the z disc during muscle contraction
C)blocks the active site on the actin molecule
D)all of the above


3The troponin molecule has three subunits. All of the following are correct names for these subunits except:
A)TnI
B)TnC
C)TnT
D)TnE
 
<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg:: ::/sites/dl/free/0072919264/63072/1110.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (20.0K)</a>



4This graph depicts the phenomena known as treppe.
A)True
B)False


5In the graph above, why is there no muscle tension generated by stimuli 1, 2 and 3?
A)because these stimuli are below the level of detectibility of the muscle receptors
B)they are not frequent enough
C)both a and b
D)there is not enough information given to answer the question


6In the top panel the muscle tension generated increases to until stimulus level 7, and then stabilizes. What is the physiological explanation for this phenomenon.
A)the muscle is warming up
B)there is not enough ATP available to supply the muscle with energy
C)more and more motor units respond, until there are none available
D)both a and c are correct





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