Adding high potassium solution (50mM) to smooth muscle organ(uterus, bladder, stomach) results in a large contraction. Why?
Key Notes:
1. Ca2+ is the link
2. Ca2+ moves through through voltage-gated Ca2+ channels
3. A change in voltage (a change in membrane potential,depolarisation) stimulates those channels
4. The change in K+ concentration causes depolarisation. How?