The University of Maryland Medical School has discovered taste receptors found on the tongue are also in human lungs. The specific receptor in the lungs is for tasting bitterness.
Of exceeding interest is the lung receptor being connected with the muscle that regulates airway contraction and relaxation.
The Maryland scientists feel they can help treat asthma by manipulating the bitterness receptor.
Perhaps this will mean lemon or rhubarb inhalers!