Substernal chest tightness and shortness of breath for 2 hours. Twenty minutes before the onset of the pain, she had smoked crack cocaine. Her pulse is 110/min, and blood pressure is 170/100 mm Hg. Bilateral basilar crackles are heard. There is an S4 gallop. A nonradiating, grade 2/6, systolic ejection murmur is heard at the upper right sternal border. What is the most likely diagnosis?

What does the body do during the resistance phase of the gas model? options: a) it prepares to fight danger or run from it. b) it identifies the primary source of danger. c) it begins to return responses to normal. d) it repairs itself from fatigue and stress.

Check all that occur during ventricular systole. a. the av valves open to allow blood to enter the ventricles from the atria. b. the av valves open to allow blood to enter the ventricles from the atria. c. the semilunar valves remain closed throughout systole to prevent backflow of blood into the ventricles. d. the semilunar valves remain closed throughout systole to prevent backflow of blood into the ventricles. e. the semilunar valves open to allow blood to flow into the large arteries. f. the semilunar valves open to allow blood to flow into the large arteries. g. the av valves close to prevent backflow of blood into the atria.

True or false. repeated drug use may lead to drug tolerance which occurs when a user requires larger amounts of the drug to achieve the desired effect.