We now class tellurium as a metalloid because, as the confused scientists of the 1700s first noticed, it has properties that sit between those of metals and nonmetals. Hubble Telescope Wide Field Camera 3.
Water also easily enters the lymphatic capillaries via gaps between the lymphatic endothelial cells. These gaps function also as flap valves and this also promotes forward lymph flow when the capillaries are compressed. In other areas of the body the water permeability of capillary membranes is quite low.
Action potential and Na+. It is a fact that Na+ ions cross the membrane and enter the cell during the rising phase of the action potential. The process happens because Na ions channels are open. Then the ions channels becomes inactivated/closed for a while. What happens to the Na+ ions that entered the cell?