ca++ is stored in the t - tubule in the muscle.
where is ca++ stored in the muscle?
the t - tubule
na
na
there are 3 subfamilies of ca+2 channels; l-type ca+2 channels, non-l-type ca+2 channels (including r-type) and the t-type ca+2 channels. there are two phases of the insulin secretion, the first phase involves the l-type ca+2 channels and the second phase involves the r-type ca+2 channels. the ca+2 influx generated by r-type ca+2 channels is not enough to cause insulin exocytosis, however, it increases the mobilization of the vesicles towards the cell membrane.





















































section::::transduction pathway.:fatty acids and insulin secretion.
insulin signal transduction pathway