This in turn reduces water loss through evaporation, but these stress signals also stimulate the formation of fruit or seeds in a sort of reproductive reflex.

Removal of these bodies appears to stimulate the formation of new ones in the same place.

These factors stimulate the formation of new blood vessels (angiogenesis).

Among the secreted chemicals are those that stimulate the formation of blood cells and blood vessels; pyrogens, the fever-producing substances; and enzymes involved in lipoprotein metabolism.

Through a number of mechanisms anabolic steroids stimulate the formation of muscle cells and hence cause an increase in the size of skeletal muscles, leading to increased strength.