Which gland's medulla secretes catecholamines like epinephrine?

Study for the Paramedic Aandamp;P Exam. Engage with flashcards and multiple choice questions, complete with hints and explanations. Prepare effectively for your exam!

Multiple Choice

Which gland's medulla secretes catecholamines like epinephrine?

Catecholamines like epinephrine are produced by the adrenal medulla, the inner portion of the adrenal gland. The medulla houses chromaffin cells that act like modified sympathetic neurons and are directly stimulated by preganglionic sympathetic fibers to release epinephrine (and norepinephrine) into the bloodstream. This rapid hormonal surge prepares the body for fight-or-flight—raising heart rate and contractility, opening airways, increasing blood glucose, and mobilizing energy stores. The other glands listed don’t produce catecholamines in their medullas: the pituitary and hypothalamus regulate other hormonal systems, and the adrenal cortex manufactures steroids such as cortisol and aldosterone, not catecholamines.

Catecholamines like epinephrine are produced by the adrenal medulla, the inner portion of the adrenal gland. The medulla houses chromaffin cells that act like modified sympathetic neurons and are directly stimulated by preganglionic sympathetic fibers to release epinephrine (and norepinephrine) into the bloodstream. This rapid hormonal surge prepares the body for fight-or-flight—raising heart rate and contractility, opening airways, increasing blood glucose, and mobilizing energy stores. The other glands listed don’t produce catecholamines in their medullas: the pituitary and hypothalamus regulate other hormonal systems, and the adrenal cortex manufactures steroids such as cortisol and aldosterone, not catecholamines.

More practice questions