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Samenvatting Hoofdstuk 3 - Hormonal Regulation of Exercise (deel 1) $7.28   Add to cart

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Samenvatting Hoofdstuk 3 - Hormonal Regulation of Exercise (deel 1)

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Samenvatting hoofdstuk 3

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  • February 4, 2021
  • 5
  • 2019/2020
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INSPANNINGSFYSIOLOGIE
HOC 03: HORMONALE CONTROLE GEDURENDE INSPANNING (DEEL 1 – ZELFSTUDIE)


Het endocrien systeem

Het endocriene systeem

Een communicatiesysteem
- Zenuwstelsel = elektrische communicatie
- Endocrien systeem = chemische communicatie

Langzamer reagerend en duurzamer dan het zenuwstelsel

Behoudt homeostase via hormonen
- Chemicaliën die de activiteit van cellen/ organen regelen en reguleren
- Inwerken op doelcellen (hormonale receptoren)

Bewaakt voortdurend de interne omgeving

Coördineert integratie van fysiologische systemen tijdens rust en oefening

Behoudt homeostase tijdens inspanning
- Regelt substraatmetabolisme
- Regelt de vloeistof- en elektrolytenbalans
- "Oefening vertegenwoordigt een fysieke stress die homeostase uitdaagt"


Endocriene organen

• Hypothalamus
• Pituitary gland = hypofyse
• (para)thyroid = (bij)schildklier
• Thymus gland = zwezerik/thymus
• Adrenal gland = bijnier
• Pancreas = alvleesklier
• Ovaries = eierstokken
• Testes = teelballen




1

, Hormonen

Aard van hormonen:

• Chemische classificatie:
o Steroid
o Niet-steroïde
o Prostaglandines

• Hormoonacties

• Controle van hormoonafgifte


STEROIDE HORMONEN

Oplosbaar in lipiden

Diffusie door celmembranen; receptoren in cel

Chemische structuur is afgeleid van of is vergelijkbaar met cholesterol

Afgescheiden door 4 grote klieren:
- Bijnierschors (cortisol, aldosteron)
- Eierstokken (oestrogeen, progesteron)
- Testes (testosteron)
- Placenta (oestrogeen, progesteron)



NON-STEROIDE HORMONEN

Niet-lipide oplosbaar

Kan niet door celmembranen diffunderen; bevatten receptoren op celmembraan

Verdeeld in 2 groepen:

1. Eiwit- of peptidehormonen
- de meeste niet-steroïde hormonen
- van pancreas, hypothalamus, hypofyse

2. Aminozuurderivaten hormonen
- Thyriod-hormonen: triiodothyronine (T3) en thyroxine (T4)
- Bijniermerghormonen: (noch) epinefrine




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