A Level Biology Revision Year 13 quotThe Endocrine Systemquot

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In this video, we look at the endocrine system. First we explore what is meant by endocrine glands and compare these to exocrine glands. We then look at the different types of molecules that can act as endocrine hormones. Finally, we explore how steroid hormones and non-steroid hormones trigger a response in their target cells. This includes the role of second messengers such as cyclic AMP. • Image credits • Endocrine system • https://commons.wikimedia.org/wiki/Fi... • OpenStax Tomáš Kebert umimeto.org, CC BY-SA 4.0 https://creativecommons.org/licenses/..., via Wikimedia Commons • Sweat • https://commons.wikimedia.org/wiki/Fi... • Bibikoff, CC BY 2.0 https://creativecommons.org/licenses/..., via Wikimedia Commons • ADH • https://commons.wikimedia.org/wiki/Fi... • Edgar181, Public domain, via Wikimedia Commons • Human Insulin • https://commons.wikimedia.org/wiki/Fi... • Zappys Technology Solutions, CC BY 2.0 https://creativecommons.org/licenses/..., via Wikimedia Commons • Testosterone • https://commons.wikimedia.org/wiki/Fi... • Klaus Hoffmeier, Public domain, via Wikimedia Commons • Adrenaline • https://commons.wikimedia.org/wiki/Fi... • Roland Mattern, Public domain, via Wikimedia Commons • DNA (modified as part of image of cell) • https://commons.wikimedia.org/wiki/Fi... • Laboratoires Servier, CC BY-SA 3.0 https://creativecommons.org/licenses/..., via Wikimedia Commons

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