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47. a student is frightened by a loud noise, which results in a hormone being released into the blood. the hormone causes the student's heart to beat rapidly. the two systems that work together to cause this reaction are the endo- crine system that secretes the hormone and the (1) nervous system (3) excretory system (2) reproductive system (4) digestive system

One of the benefits of studying communication is that it people become effective leaders. select the best answer from the choices provided t f

Which of the following root words means "small"?