Positive feedback differs from negative feedback in that one: a. positive feedback systems have only effectors, whereas negative feedback systems have only receptorsb. the positive feedback's effector responses are in the same direction as the initiating stimulus rather than opposite of itc. positive feedback loops are more frequently encountered in the control of homeostasisd. positive feedback benefits the organism, whereas negative feedback is detrimentale. the effector's response increases some parameter (such as body temperature), whereas in negative feedback it can only decrease the parameter