Charge maintained by chloride entering RBC (chloride shift) Hydrogen ions combine with haemoglobin to form haemoglobonic acid. Hydrogencarbonate ions Releasing oxygen The partial pressure of oxygen (also called oxygen tension) of respiring tissues is lower than the lungs.
Screening is a process for evaluating the possible presence of a particular problem. The outcome is normally a simple yes or no. Assessment is a process for defining the nature of that problem, determining a diagnosis, and developing specific treatment recommendations for addressing the problem or diagnosis.
A screening test is a test provided to a patient in the absence of signs or symptoms. A screening colonoscopy is a service performed on an asymptomatic person for the purpose of testing for the presence of colorectal cancer or colorectal polyps.