A researcher performed an ELISA test and observed that one o…

A researcher performed an ELISA test and observed that one of the samples was much darker than the others. The researcher concluded that this result was incorrect, and it was due to high background noise. Which of these is NOT a possible explanation for the background noise? .

Use the following patient vignette to answer questions 27 an…

Use the following patient vignette to answer questions 27 and 28. The patient returns to your office 8 weeks later for repeat evaluation.  She has lost 8 lbs through a combination of exercise (walking 20 minutes three times per week) and diet.  Laboratory tests show a detectable improvement across the board.  Chest x-ray, ECG and urinalysis are normal.  Her blood pressure in the office averages 140/90 mmHg, with 78 bpm pulse. 28. Which of the following treatments is the next best step in managing this patient’s hypertension?