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Samenvatting Voedingskundige analyse Calcium
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Voedingskundige analyse Calcium
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Uitwerking voedingskundige analyseLiteratuurbron Nutriënt:
Vraag: In welke bron kun je het antwoord vinden? Calcium
Wat is de functie, waar is het voor? - Hoorcollege vetoplosbare vitamines, P41, Functies:
Wat is de chemische structuur? - Bot- en gebitontwikkeling (opbouw/ onderhoud)
42
- Rol bloedstolling
- Overdracht zenuwprikkels
- Samentrekken spieren
- Activering van enzymen
- Afscheiding en activering van hormonen
Calcium is een mineraal, afgekort als Ca en met atoomnummer 20.
Hoe wordt deze stof in het lichaam verwerkt? - Hoorcollege vetoplosbare vitamines, P44, Via voeding in de darm
Vertering 53 Absorptie door darmwandcellen:
Absorptie
1. Actief transport
Transport - Darmcel in via cholecalciferolafhankelijk Ca-bindend proteïne (calbindine)
Metabolisme - Darmcel weer uit, bloed in via ATP-afhankelijke Ca2+-pomp of uitwisseling met
Opslag Na+
uitscheiding
2. Passief transport
- - Darmcel in indien Ca-concentratie in darm (chymus) > bloed
- - Darmcel weer uit via exocytose
- Hoorcollege vetoplosbare vitamines, P49,
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