E. Mechanical receptors are located in the lungs, upper airways, chest wall, and diaphragm which prevent overdistension of the lungs. F. Respiratory defense mechanisms: 1. filtration of air by the upper airways 2. mucociliary clearance system -which is decreased by infection, atropine, alcohol, dehydration,
However, one. of the most challenging aspects of forensic DNA analysis is the. interpretation of low-level testing results where it is difï¬cult to. distinguish reliably between noise and signal from template DNA. that is associated with an evidence sample (3,4).
Legal Tests. DNA tests performed for use in a court case, such as child support or immigration, require a legal chain of custody and testing in an accredited laboratory. The chain of custody is everything that happens to a sample from collection to submission for testing. This process is followed to ensure integrity of the sample throughout the process. Once the results of the legal DNA test are provided, they may be used as evidence wherever needed.