Chromaffin cells

Definition

Chromaffin cells are specialized cells located in the adrenal medulla, part of the adrenal gland, which release adrenaline and noradrenaline into the bloodstream in response to stress signals from the autonomic nervous system. These hormones prepare the body for a 'fight or flight' response by increasing heart rate, blood pressure, and blood glucose levels.

Related terms

Adrenal medulla: The inner portion of the adrenal gland where chromaffin cells are located and where adrenaline and noradrenaline are produced.

Adrenaline (Epinephrine): A hormone secreted by chromaffin cells that increases heart rate, muscle strength, blood pressure, and sugar metabolism in response to stress.

Autonomic Nervous System: The part of the nervous system that controls involuntary actions and regulates bodily functions such as heart rate, digestion, respiratory rate, pupillary response, urination, and sexual arousal