Electromech Coupling Flashcards
1
Q
What does Ca bind to in muscle? SM?
A
Troponin-C; calmodulin
2
Q
What is connected at the Z line
A
Actin
3
Q
What is the A band
A
Mostly myosin and some actin
4
Q
What does the AP of cardiac cells open first as a v-gated Ca channel
A
Dihyropyridine receptor
5
Q
What are the ligand gated Ca channels inside the cells
A
Ryanodine receptors
6
Q
Sympathetic stimulation via NE and β1 receptors causes what
A
More Ca to enter during AP
More Ca to be sequestered in SR
7
Q
Preload measures a ______ while afterload measures a __________
A
Volume; pressure
8
Q
What is the stroke work
A
SV*Pressure of aorta
