3.5 The Endocrine System — Where Do Hormones End and Neurons Begin | Psychology 2e

This lesson takes an unexpected look at Section 3.5 of OpenStax Psychology 2e — a section titled "The Endocrine System" whose extracted focus lands squarely on a single word: neurotransmitters. Rather than treating that as an editorial error, the hosts unpack why the textbook deliberately places neurotransmitters inside an endocrine system discussion, and what that structural choice reveals about how these two communication systems actually relate. It's a short but thought-provoking dive into the limits of categorization in biology. In this video: • Why a section called 'The Endocrine System' highlights the word neurotransmitters — and why that's intentional • The endocrine system as the body's 'mass email blast' vs. neurotransmitters as direct, encrypted Slack messages • How textbook structure can itself make a biological argument about interconnected systems • The idea that neat chapter categories are a human convenience, not a biological reality • Why separating the nervous and endocrine systems into isolated silos misrepresents how the body works • A closing question: does a true boundary between the brain's chemical messaging and the body's physical responses even exist? #OpenStax #Psychology #EndocrineSystem #Neurotransmitters #BioPsychology OpenStax Content adapted from "OpenStax Psychology 2e", by OpenStax licensed under CC BY 4.0. Content based on Web Version: Apr 23, 2026. Read the textbook online https://openstax.org/details/books/psychology-2e Music first girl talking to me. by ikkun (ex. Barradeen) | https://soundcloud.com/ikkunwastaken Royalty Free Music by https://www.free-stock-music.com Creative Commons / Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0) https://creativecommons.org/licenses/by-sa/3.0/deed.en_US