A69-year-old female was involved in a motor vehicle crash. she is semiconscious with a blood pressure of 80/50 mm hg and a heart rate of 74 beats/min that is weak. her daughter, who was uninjured in the crash, tells you that her mother has a history of hypertension and takes beta-blockers. considering the fact that this patient is probably in shock, what is the most likely explanation for the absence of tachycardia?

Aresearcher lyses a cell that contains nucleic acid molecules and capsomeres of tobacco mosaic virus (tmv). the cell contents are left in a covered test tube overnight. the next day this mixture is sprayed on tobacco plants. we expect that the plants would ) develop some but not all of the symptoms of the tmv infectionb) develop the typical symptoms of tmv infectionc) not show any disease symptomsd) become infected, but the sap from these plants would be unable to infect other plants