What is assistive technology? Assistive technology (AT) is any item, piece of equipment, software program, or product system that is used to increase, maintain, or improve the functional capabilities of persons with disabilities. AT can be low-tech: communication boards made of cardboard or fuzzy felt.
The synthesis and release of chemical substances by cells or glands. Substances secreted include enzymes, hormones, lubricants, surfactants and neurotransmitters. Internal secretion is secretion into the bloodstream. External secretion may be into the intestinal canal or other organs or on to the skin. Compare EXCRETION. 1  the process by which a useful substance produced in a cell is passed through the plasma membrane to the outside.  the substance itself.
1. The process of secreting a substance, especially one that is not a waste, from the blood or cells: secretion of hormones; secretion of milk by the mammary glands. 2. A substance, such as saliva, mucus, tears, bile, or a hormone, that is secreted.ecretion. 1  gall-As in gallbladder, it refers to a secretion of the liver or to bile. 2  honeyflow-The period of secretion of honey or nectar by flowers. 3  sepia-A cuttlefish, the origin of the brown pigment prepared from a secretion of the fish.