The Walker Art Center is home to an in-depth collection of Oldenburgâs work, ranging from early performance-related objects to large-scale outdoor sculpture to drawings, prints, multiples, and rare studies.
Chemoreceptors detect the levels of carbon dioxide in the blood by monitoring the concentrations of hydrogen ions in the blood. Learning Objective. Describe the role of chemoreceptors in the regulation of breathing. An increase in carbon dioxide concentration leads to a decrease in the pH of blood due to the production of H+ ions from carbonic acid.
Although blood and breath tests are more commonly used to detect the presence of alcohol in the bloodstream, they only detect what a person drank recently, Reisfield says. Another type of test, called an EtG, measures the level of substances left behind after alcohol is metabolized and can detect use over a longer period of time. The UF study looked at these types of tests, which measure the levels of ethyl glucuronide and ethyl sulfate in urine as indicators of alcohol use.