Cardiovascular

Question 1

Describe the cardiomyocyte contractile cycle

Answer 1

1) Ca2+ binds to troponin C to displace tropomyosin from actin sites
2) Crossbridges form ATP -> ADP + P
3) Power stroke, ADP+P released
4) ATP+ myosin = actin release, recocking of myosin head
5) continues until [Ca2+] decreases