Fight or flight reactions cause activation of 

• the parathyroid glands, leading to increased metabolic rate

• the kidney, leading to suppression of reninangiotensin - aldosterone pathway 

• the adrenal medulla, leading to increased secretion epinephrine and norepinephrine

• the pancreas leading to a reduction in the blood sugar levels

C.

the adrenal medulla, leading to increased secretion epinephrine and norepinephrine

Fight or flight reaction is a physiological reaction that occurs in response to an emergency. Emergency hormone are secreted by adrenal medulla of adrenal gland secretes adrenaline (epinephrine) and nor alternative (norepinephrine) hormones which stimulate sweating, heart beat and breathing rate. These also cause dilation of coronary artery ( for increasing inspiratory volume)and pupil (for better vision)