The disease bullous permphigoid results in the destruction of protein within the basement membrane that holds the epidermis and dermis together . how would this likely impact the epidermis . would the skin be an effective barrier?

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

you should wear a lead protective shield when having teeth x-rays

hope i

-lavira : )