Saltatory conduction is made possible by:

Graded potentials travel down the membrane via ___________ propagation.

With myasthenia gravis:

Identify the hair matrix.

Identify the papillary layer.

Which hormone reduces the amount of calcium ions in the bloodstream?

Only dermal portion of the hair.

Articulations permitting only slight degrees of movement are:

Although the integument is a covering, it is by no means simple, and some of its functions include ________.

Consider how molecules move into or out of a red blood cell.  To prevent an uneven distribution of ions as _____________ moves into the plasma, _________ shifts into the red blood cell.