is epinephrine and norepinephrine activate already existing hormones

Answer 1

No, epinephrine and norepinephrine are not hormones themselves, but rather neurotransmitters that are released by the adrenal glands in response to stress or perceived danger. They act as chemical messengers in the nervous system to prepare the body for a fight-or-flight response. Once released, epinephrine and norepinephrine bind to specific receptors on various organs and tissues, activating specific physiological responses such as increased heart rate, dilated airways, and increased blood sugar levels.