When You're the One Canceling a Flight. In defense of Spirit, most airlines operate on razor thin margins and refund dollars do add up. Even airlines that allow refunds-generally only under very special circumstances-may make you jump through hoops and even pay a fee.
Medical Definition of receptor. 1  1: a cell or group of cells that receives stimuli : sense organ. 2  2: a chemical group or molecule (as a protein) on the cell surface or in the cell interior that has an affinity for a specific chemical group, molecule, or virus.
Olfactory Membrane. The olfactory membrane, or epithelium, is a layer of cells on the roof of the nasal cavity. It is made up of three layers of cells: the supporting cells, the olfactory receptor cells, and the basal cells.Supporting cells are similar to glial cells and help produce mucus.Basal cells are the source of new receptors. Olfactory receptor cells, actually neurons, are the site of transduction.t is made up of three layers of cells: the supporting cells, the olfactory receptor cells, and the basal cells. Supporting cells are similar to glial cells and help produce mucus. Basal cells are the source of new receptors. Olfactory receptor cells, actually neurons, are the site of transduction.