I believe the correct answer from the choices listed above is option 1. ATP and calcium are the ones who participate in muscle movement. Contraction is initiated by the release of calcium ions (Ca2+) upon the depolarization of the membrane, which is induced by nerve impulses.
answered: Guest
Answerweathering;
answered: Guest
D. a mountain abd are made by volcanos and tectonic plates
Read the article about the fraser river, one of the most important rivers in canada. what is the most important species of fish in this river? why are the numbers of these fish declining?