Alicensed practical nurse (lpn) is providing palliative care to a client who has undergone surgery as a measure to treat lung cancer. a registered nurse teaches the lpn the interventions that need to be performed if ineffective airway clearance related to the surgery develops in the client. which statement by the nurse indicates a need for further teaching.

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.