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Biologie Nectar vwo 5 samenvatting hoofdstuk 12 Hormonen

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Biologie Nectar Vwo - Samenvatting Hoofdstuk 12: Hormonen * Paragraaf 1: Hormoonstelsel & Terugkoppeling – Endocriene klieren geven hormonen direct af aan het bloed. De hypothalamus en hypofyse sturen dit aan via negatieve terugkoppeling. * Paragraaf 2: Soorten hormonen & Werking – Hydrofiele peptidehormonen binden aan membraanreceptoren, terwijl hydrofobe steroïd- en tyrosinehormonen het celmembraan passeren om direct het DNA te activeren. * Paragraaf 3: Calciumregulatie & Botten – Parathormoon (PTH) en calcitonine werken als antagonisten om het calciumgehalte in het bloed constant te houden, samen met vitamine D en botcellen (osteoclasten en osteoblasten). * Paragraaf 4: Bloedsuiker & Stress – Insuline verlaagt en glucagon verhoogt de bloedsuikerspiegel (via de alvleesklier), en adrenaline bereidt het lichaam voor op actie bij stress. * Paragraaf 5: Schildklier, Honger & EPO – De schildklier regelt de verbranding via T3 en T4 (gestuurd door TRH en TSH), leptine en ghreline regelen honger/verzadiging, en EPO stimuleert de aanmaak van rode bloedcellen.


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Level
School year
5
Uploaded on
August 25, 2026
Number of pages
8
Written in
2025/2026
Type
Summary
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