What triggers the release of calcium ions from the sarcoplasmic reticulum?Multiple choice question.The repolarization of the sarcolemmaThe movement of troponinThe depolarization of the adjacent transverse tubuleATP release

Calcium ions released from the sarcoplasmic reticulum enter the ______________.Multiple ChoicenucleussarcoplasmT tubulessarcolemma

Calcium ions are released from the sarcoplasmic reticulum into the cytosol

In response to action potentials arriving along the transverse tubules, the sarcoplasmic reticulum releasesQuestion 5Select one:a.H+b.Ca2+c.K+d.Na+e.ACh

Excitation-contraction coupling begins with ______________.Multiple Choicethe release of a cross-bridgedepolarization of the transverse tubulesthe release of calcium from the sarcoplasmic reticulumproduction of an action potential on the sarcolemma

Which of the following events in muscle contraction is the last to occur chronologically? The T-tubules depolarize, causing calcium to be released from the sarcoplasmic reticulum. Calcium is taken up into the sarcoplasmic reticulum. Tropomyosin moves, exposing the actin active sites. ATP binds to the myosin head allowing it to release from actin.