13.During the QT interval of the ECG, thea)Atria contract & begin to relaxb)Atria relaxc)Ventricles contract & begin to relax**d)Ventricles relax14.Which of these mechanisms results in decreased blood pressure?15.Which of these conditions occur as a result of increased angiotensin II production?16.Which of these causes precapillary sphincters to relax?17.If a person has a diastolic pressure of 100 mmHg, and a diastolic pressure of 70 mmHg, her pulse pressure is:a)170 mmHgb)85 mmHgc)30 mmHg**d)25 mmHge)20 mmHg18.Vascular compliance19.If each of these factors is doubled, which has the greatest influence on blood flow?20.Which of these statements concerning respiration is NOT true?
Christopher W. Bessette1821.The HeringGBreuer reflexa)Inhibits inspiration**b)Stimulates inspirationc)Occurs in response to changes in carbon dioxide in the bloodd)Both b and c22.The most important factor for regulating respiratory rate is23.Hyperventilation produces which of these effects?
