Yes. Plasma is electrically conductive and so a magnetic field of suitable strength will be able to contain it.
hormones, sugars, protein, antibodies, vitamins, carbon dioxide
Gravitational fields and electromagnetic fields are different in that Gravitaional fields are dependent on the masses of objects and the electromagnetic field depends on the charges of objects.
Electromagnetic fields can be varying in intensity. A magnet is static.
They explode!
all electromagnetic waves