"as their name suggests, calcium ion channel blockers block calcium ion channels in the sarcolemma of pacemaker and contractile cardiac muscle cells and slow calcium ion entry into the cell during an action potential. what effects would these drugs have on the myocardial cells? "

There would be a decrease in contractility

Explanation:

Since the calcium ion channel blockers slow down the calcium ion and they do not affect the potassium ion efflux which thus leads to a quick repolarization of the cell. This causes the muscle cell to lose the ability to sustain the excitability needed to keep it in a contracted state.  

its a hope it good luck

european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.