adding an approximate ed80 concentration of norepinephrine ( ne ; 3 x 10 ( -7 ) m ) , histamine ( hist ; 3 x 10 ( -6 ) m ) , or serotonin ( 5ht ; 3 x 10 ( -6 ) m ) to this solution results in a transient increase in developed force that is attributed to release of a limited cellular pool of ca++ .
C0019588
histamine
C0543456
hist