dxtxpx
Forum Guru
Topics: 259
Posts: 1,233
|
L-type Ca+2 channels of sarcolemma :
a) Large sustained conductance, inactivate fast
b) minimal in cardiovascular system, are responsible for plateau phase of action potential
c) may trigger release of internal Ca+2
d) resistance to Ca+2-channel blockers
e) cardiac L-channels are regulated by ATPase
|
| asmi
Forum Hero
Topics: 1043
Posts: 4,609
|
c...?
|
| dxtxpx
Forum Guru
Topics: 259
Posts: 1,233
|
correct
L-type channels: Large sustained conductance, inactivate slowly, widespread in cardiovascular system, are responsible for plateau phase (slow inward current) of action potential, may trigger release of internal Ca++, sensitive to Ca++-channel blockers, cardiac L-channels are regulated by cAMP-dependent protein kinase (phosphorylation enhances probability of channel opening at a given membrane potential)
|
|
| |
| | | |
