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Inactivation of phospholamban in cardiac muscle decreases which of the following?

A. The velocity of contraction in smooth muscle
B. The duration of contraction
C. The strength of contraction
D. The depolarization required to initiate a contraction
E. The amount of calcium released from the sarcoplasmic reticulum


E. it would increase uptake Ca2+ sarc retic


a little help,please
how is phospholamban and what is it doing?


its B

:arrow: its a protein in SR ,inhibits SR calcium pump .


thank you;i'll study


its mentioned in BRS


I agree, should read the question better. :-)

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