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Question Answer Wrong Answers
what is a difference between nebulin and titin nebulin is not elastic, titin is elastic
95.2%
nebulin is elastic, titin is not elastic
0%
nebulin is stabilizing the myosin, titin is stabilizing the actin
4.8%
one is the thin filament and one is the thick filament
0%
What is the role of DHP during the excitation-contraction coupling? DHP is activated by a change in voltage and opens RyR to release Ca+ from the sarcoplasmic reticulum
95.2%
DHP is activated by a change in voltage and opens RyR to release Na+ from the sarcoplasmic reticulum
4.8%
RyR is activated by a change in voltage and opens DHP to release Ca+ from the sarcoplasmic reticulum
0%
RyR is activated by a change in voltage and opens DHP to release myosin from the sarcomere
0%
What muscle metabolism is dominant when doing a one rep maximum lift phosphocreatine breakdown (PCr)
90.5%
anaerobic glycolysis
0%
aerobic respiration
4.8%
kern's cycle
0%
T/F: muscle fatigue is due to ATP depletion false
90.5%
true
4.8%
What is Henneman's size principle? recruits type I first, then type II if tension demand increases
90.5%
recruits type II first, then type I if tension demand increases
0%
shows that type II last longer because they have larger cell bodies
4.8%
none of the choices
0%
trying to move a 50,000 lb boulder by your arm muscles is an example of isometric contraction
90.5%
isotonic contraction
4.8%
concentric contraction
0%
eccentric contraction
0%
what is a muscle twitch the contraction and relaxation cycle for one muscle fiber
85.7%
the contraction and relaxation cycle for one muscle organ
4.8%
the contraction for one sarcomere
4.8%
only a fasciculation
0%
what does the length-tension relationship show? there is an optimal sarcomere starting length for optimal tension
85.7%
the longer the sarcomere, the more tension
0%
the shorter the sarcomere, the more tension
9.5%
the length of innervation directly affects tension
0%
what is a string of g-actin called f-actin
85.7%
troponin
9.5%
tropomyosin
4.8%
s-actin
0%
what metabolic pathway is dominant in type I muscle cells? aerobic resiration
85.7%
PCr
0%
anaerobic glycolysis
9.5%
an ATPase isoform
0%
T/F: muscles have nociceptors false
81%
true
19%
what is the difference between unfused tetnus and complete tension? unfused tetnus hits maximum tension with each action potential and oscillates. complete tension is a constant max tension reached
81%
unfused tetnus is a constant max tension reached. complete tension hits maximum tension with each action potential and oscillates.
14.3%
fatigue is only reached with unfused tetnus
0%
none of the choices are correct
0%
how does a skeletal muscle relax? sarcoplasmic ATPase pumps Ca+ into SR and Ca+ unbind from troponin
76.2%
sarcoplasmic ATPase pumps Ca+ into SR and Ca+ unbind from myosin
14.3%
sarcoplasmic ATPase pumps Na+ into SR and Ca+ unbind from troponin
0%
sarcoplasmic cholinesterase pumps Ca+ into SR and Ca+ unbind from troponin
4.8%
according to the load-velocity relationship, when the load increases the velocity of sarcomere shortening will _________ decrease
76.2%
increase
14.3%
stay the same
4.8%
kill the cell
0%
what does the sliding filament explain? the excitation-contraction coupling
76.2%
the innervation of a muscle fiber
0%
the organization of a muscle fiber
4.8%
the summation of muscle twitches
14.3%

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Created Sep 1, 2019ReportNominate
Tags:Flex, muscle, phy

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