🤓 Based on our data, we think this question is relevant for Professor Richardson's class at UNH.
The cross-bridge cycle starts when _________. select one
a. ATP binds to troponin and is hydrolyzed to ADP and Pi
b. acetylcholine diffuses away from the synaptic cleft
c. Ca2+ is actively transported into the sarcoplasmic reticulum
d. Ca2+ from the sarcoplasmic reticulum binds to tropomyosin
e. Ca2+ from the sarcoplasmic reticulum binds to troponin