Final answer:
Guided imagery can lead to a decrease in blood pressure, as indicated by decreased firing rates of baroreceptors and reduced release of stress hormones from the adrenal glands.
Step-by-step explanation:
When addressing the question What can guided imagery lower in terms of physiological response? based on the provided information, it is evident that guided imagery can lead to a decrease in blood pressure. This is supported by the points that highlight decreased firing rates of baroreceptors and decreased epinephrine and norepinephrine release by the adrenal glands, both of which are associated with lower blood pressure responses. Guided imagery can induce a relaxation response, anticipated by the limbic system, which in turn may decrease heart rate and lower blood pressure as physiological changes. Hence, the correct answer would be (b) decrease in blood pressure.