The adrenal medulla is the inner part of adrenal gland which lies above the kidney.
Adrenal medulla produces following two hormones:
1. Adrenaline : It is an emergency hormone because it is produced at the time of emergency or stress. Adrenaline instantly prepares our body for fight or flight. It increases breathing rate, heart rate, B.P. and also helps in releasing RBC from spleen.
2. Nor-adrenaline or Nor-epinephrine : This hormone regulates the heart rate, breathing rate, B.P. at normal time.