Answer Happy

Question Completion Status: QUESTION 20 Questions 13-15 pertain to this experiment: Alzheimer's disease (AD) is a devastating illness that gradually destroys a person's memory and ability to think. As the disease progresses, the brain becomes riddled with deposits of a protein molecule called beta-amyloid, the accumulation of which is believed to cause brain damage. One of the significant hurdles in the fight against AD is the lack of diagnostic tests; doctors cannot be entirely sure that a person has AD until an autopsy. The development of an early test for Alzheimer's remains an important but so far elusive goal. Progress towards a diagnostic test began with the observation by researchers at the University of Pittsburgh, and Upsala University in Sweden that a protein molecule they dubbed PIB binds to beta-amyloid. The PIB molecule includes an Atom of carbon-11 a rare radioactive isotope of carbon. When PIB is injected into the brain, the radiation emitted by the carbon-11 isotope can be detected and visualized on a computer screen using a PET scanner. This medical diagnostic device detects and displays radioactive emissions. The researchers then asked the question, can radioactive isotopes be used to identify Alzheimer's disease in living patients? They hypothesized that PIB could be used this way. They made the prediction that following a PIB injection; PET scans would reveal higher concentrations of PIB in the brains of Alzheimer's patients than in the brains of non-infected individuals The experiment that researchers used to test this hypothesis involves 16 patients diagnosed with mild Alzheimer's disease and nine healthy control subjects. The PET scans of the aid patients did indeed go higher concentrations of PIB in regions of the brain known to be affected by Alzheimer's these results published in 2004 suggest that radioactive PIB molecules may hold the key to early detection of this crippling disease. AD Control 1 points Save Answe
Question Completion Status: Min PIB PET SCANS University of Pittsburgh PET Amyloid Imaging Group Pittsburgh compound 8 (PB) is currently being muded. The PET brain scan on the left is of a person with mild Alzheimer's disease and the scan on the night is from a healthy adult. Ped areas show the greatest levels of amyloid, and the dark blue indicates no amyloid The other in order like the colors of a rainbow show progressively lower levels of colors See O Hear O Think O Taste image Crede University of Pittsburgh Medical Center
Taste. QUESTION 21 Refer to the previous article to answer this question. Alzheimer's disease is a result of: O Lipid deposits in the brain O beta-amyloid protein deposits O PIB deposits O nucleic acid deposits
QUESTION 22 The experiment described in the article was used to test the hypothesis Can radioactive PIB be used to detect Alzheimer's Can radioactive PET protein be used to detect Alzheimer's O Can radioactive Beta-amyloid be used as a radioactive isotope to detect Alzheimer's All of these were tested in this experiment