You would best describe Economics as the study of how society allocates resources and good as well. This would be how resources are limited, and how they can keep up with the unlimited demands and wants of the resources.
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.
As the natural selection is the differential survival of the individual due to the selection of the individual's due to the difference in the phenotypes and is a key mechanism to the evolution as its characterized by the inherent traits of a population over time as the variation exists in all species of organisms and is contrasted to the artificial selection.
