A hormone from the adrenal glands that prepares the body for fight or flight.
Released from the adrenal medulla in stress; increases heart rate, widens airways and pupils, mobilises glucose and diverts blood to muscles. It acts via beta-adrenergic receptors and cAMP.
Adrenaline acts within seconds on many tissues. Its effects last minutes. It is made from tyrosine.
Example: adrenaline is used in emergency treatment of cardiac arrest and anaphylaxis.
A hormone from the adrenal glands that prepares the body for fight or flight.
Adrenaline is one of the 54 topics in Reproduction & Endocrinology. It is rated Beginner, so it suits learners who are starting out in biology. Related topics in this area include Hormones, Adrenal Cortex Hormones, Pulsatile Hormone Secretion.
EpiPens deliver adrenaline for anaphylaxis.
Adrenaline is a Beginner topic, so no earlier topic is required. Other Beginner topics in Reproduction & Endocrinology that pair well with it include Reproduction, Asexual Reproduction, Sexual Reproduction.
The closest topics to Adrenaline are Hormones, Adrenal Cortex Hormones, Pulsatile Hormone Secretion, Steroid and Peptide Hormone Mechanisms. Comparing them side by side is a good way to see how the ideas connect.
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Adrenaline. To practise the whole of Reproduction & Endocrinology, use the Reproduction & Endocrinology quiz.
Adrenaline: A hormone from the adrenal glands that prepares the body for fight or flight. Hormones: Chemical messengers released into the blood that regulate growth, metabolism and reproduction. Read both side by side and note what each one explains.
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Hormones and explain the difference aloud. Finally, take the Reproduction & Endocrinology quiz and come back to this page for any question you miss.
Chemical messengers released into the blood that regulate growth, metabolism and reproduction.
🌸 Reproduction & EndocrinologyCortisol regulates stress and glucose; aldosterone controls salt balance.
🌸 Reproduction & EndocrinologyGnRH and other hormones are released in pulses whose frequency encodes signalling information.
🌸 Reproduction & EndocrinologySteroid hormones cross membranes and alter transcription; peptide hormones bind surface receptors and activate second messengers.
🌸 Reproduction & Endocrinology