Muscle Physio- Skeletal Musc Function
Questions with complete solution 2025
When myosin is bound to actin during the crossbridge cycle ________. -
correct answer calcium is bound to the troponin complex, and myosin is in a
high-energy form
When an action potential travels along the sarcolemma of a muscle cell and
along a T-tubule, ________. - correct answer DHP receptors change shape,
activating ryanodine receptors, leading to Ca2+ flux into the cytosol
Put the events of the crossbridge cycle in the correct order, starting with the
binding of myosin to actin:
a) binding of ATP
b) release of Pi
c) release of ADP
d) power stroke - correct answer b, d, c, a
During a prolonged bout (longer than 30 minutes) of moderate exercise, ATP
stores are replenished by ________. - correct answer fatty acids from the
bloodstream
Which type of molecules are more likely to be found in higher concentrations
in a fast glycolytic fiber? - correct answer pyruvate and lactic acid
Small motor units ________. - correct answer tend to be recruited first during
a contraction
Questions with complete solution 2025
When myosin is bound to actin during the crossbridge cycle ________. -
correct answer calcium is bound to the troponin complex, and myosin is in a
high-energy form
When an action potential travels along the sarcolemma of a muscle cell and
along a T-tubule, ________. - correct answer DHP receptors change shape,
activating ryanodine receptors, leading to Ca2+ flux into the cytosol
Put the events of the crossbridge cycle in the correct order, starting with the
binding of myosin to actin:
a) binding of ATP
b) release of Pi
c) release of ADP
d) power stroke - correct answer b, d, c, a
During a prolonged bout (longer than 30 minutes) of moderate exercise, ATP
stores are replenished by ________. - correct answer fatty acids from the
bloodstream
Which type of molecules are more likely to be found in higher concentrations
in a fast glycolytic fiber? - correct answer pyruvate and lactic acid
Small motor units ________. - correct answer tend to be recruited first during
a contraction
