Ac Tiva Tion of M Yos in Lig Ht C

Question

Ac tiva tion of m yos in lig ht c ha in p ho sp ha tas e (M LC P) in s m oo th m us cle sh ou ld
A) Increase smooth muscle force
B) Re lax s m oo th m us cle
C) Increase the [Ca2+] in smooth m uscle cells
D) D ep ola rize the sm oo th m us cle ce lls
E) Increase Ca2+ release from the SR

Accepted Answer

Activation of myosin light chain phosphatase (MLCP) in smooth muscle leads to the dephosphorylation of myosin light chains, which causes relaxation of smooth muscle.