- Doctorate - 4-7 years, including doctoral dissertation. You can do a Phd. right from 4 year college without getting a masters first, but most people get the masters first. MD - Medical Doctor - Med school and internship, done after BS or BA degree - can take 8 years.
Because of the relationship between the dihydropyridine receptor and the ryanodine receptor, that causes calcium that is stored in the sarcoplasmic reticulum to be released, and the calcium released then causes muscle contraction.
agonist muscle prime mover (see agonist). antagonist muscle muscles or muscle groups which neutralize action of another muscle or muscle group (see antagonist; muscle contraction).cardiac muscle; myocardium striated heart muscle.ee also: muscle. agonist muscle prime mover (see agonist). antagonist muscle muscles or muscle groups which neutralize action of another muscle or muscle group (see antagonist; muscle contraction). cardiac muscle; myocardium striated heart muscle.