Cardiac muscle has prolonged contraction due to a sodium induced-calcium released process into the cytoplasm of the cell. cardiac cells can communicate through pore-like channels between cells. list the junction and the organelle involved in cardiac muscle contraction?

it depends on how much it could carry.

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101

mass and weight are closely related because mass affects the weight of an object experiencing the effects of gravity. weight is the measure of the force of gravity on an objects's mass, while mass is the measure of how much matter there is in an object.