NREMT Advanced EMT Practice Test #4

Answer - C - A negative feedback system directs blood away from the nonessential vascular beds of the periphery back to core perfusion. A negative feedback system for shock patients is closure of precapillary sphincters. This will direct blood away from the nonessential vascular beds of the periphery back to core perfusion. This effectively decreases the sixe of the vascular “container,” which brings the amount to normal proportions.