In this task, you are given a sentence. You are expected to write the name of the organism substances in the body mentioned in the input. Although there might be several correct answers, you need to write one of them.

Example Input:  The injury to the airway can create binding sites for bacteria in the basement membrane of the bronchial tree and the stimulation of the secretion of mucus , which then stagnates and can create potential sites for bacterial adherence .
Example Output: mucus

Example Input:  The agonism of 5 - HT1A receptors , negatively coupled to cAMP , reduces IOP by decreasing the production of aqueous humor , like beta - receptor antagonists which , diminishing the content of cAMP at the postjunctional site , lowers the aqueous humor secretion with a consequent decrease in IOP [ 98 ] .
Example Output: humor

Example Input:  Lactotransferrin inhibits ADP - induced platelet aggregation at concentrations down to 5 nM , which can be reached in the plasma after leukocyte degranulation .
Example Output:
plasma