The latch-bridge mechanism in smooth muscle is responsible for:
Ans. B. Sustained muscle contractionThe twitch duration in sphincters and smooth muscle is particularly longer. Latch bridges are actomyosin complexes that detach slowly; this is made possible by a slow myosin ATPase. In turn, this enables maintenance of tension for longer periods without consumption of more ATP.
Fast muscle twitch
Sustained muscle contraction
Excitation-contraction coupling
Unstable membrane potential
General