Skeletal Muscle Contraction — Topic Test
20 questions · exam mode (answers revealed at the end). 18 min suggested.
A researcher records from a single skeletal muscle fibre and selectively blocks the ryanodine receptor of the sarcoplasmic reticulum. Excitation-contraction coupling fails. Which immediate event is prevented by this block?
AReuptake of calcium by SERCA into the reticulum
BBinding of acetylcholine to the nicotinic receptor
CDepolarisation propagation along the T-tubule
DRelease of calcium from the terminal cisternae into the sarcoplasm