Cardiac Muscle

Question 1

What happens when Ca2+ is removed from cardiac muscles?

Answer 1

Zero force is produced

Question 2

Cardiac excitation contraction coupling process

Answer 2

• depolarisation causes opening of voltage gated Ca2+ channels
• Releases Ca2+ (comes from outside of cell)
• Ca2+ binds to binding site on sarcoplasmic release channel
• Ca2+ is pumped back into the store
• once the store is full it is pumped out of the cell