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Samenvatting - Natuurwetenschappen : weet wat je eet $7.03
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Samenvatting - Natuurwetenschappen : weet wat je eet

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info over fotosynthese, voedingsstoffen (glucide, monosachariden, glucose, fructose, disachariden, maltose, lactose, sacharose, polysachariden, cellullose, glycogeen), vertering, vetten, eiwitten, enzymen. (op het niveau van NAWE 3u per week)

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  • December 23, 2024
  • 9
  • 2022/2023
  • Summary
  • Secondary school
  • 3e graad
  • 5
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Hoofdstuk 7: weet wat je eet
Weet wat je eet

Voedingsstoffen

- Afbreken & gebruiken opbouw cel
- Leveren energie
- Opbouw lichaamseigen eiwitten

Over- en ondergewicht = gevaarlijk

 Meten door BMI (Body Mass Index) of buik-heupverhouding

De fotosynthese

Bladgroenverrichting -> het maken van energierijke verbindingen uit CO 2 en H2O in een chloroplast in
aanwezigheid van licht




Autotroof

-> organismen die zelf energierijke verbindingen opbouwen uit eenvoudige anorganische moleculen
(CO2 en H2O)

-> groene planten (Bv. zetmeel opgeslagen in aardappelknol)

, Heterotroof

-> organismen die hun levensnoodzakelijke energie uit energierijke verbindingen (suikers) halen die
door andere levende wezens werden opgebouwd

-> mens, dier, gistcellen,… (Bv. mens en dier verbranden suikers)

-> chemische formule celademhaling (in mitochondriën)

C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + energie

C6H12O6 -> glucose 6 CO2 -> uitademen

6 O2 -> inademen 6 H2O -> uitademen, zweten, urine

Energie -> nodig voor lichaamsprocessen



Voedingsstoffen

Opnemen via dagelijkse voeding

Tijdens spijsvertering worden ze afgebroken door de aanwezigheid van enzymen (biokatalysatoren)
tot kleine moleculen (bouwstenen) die in het bloed kunnen worden opgenomen

Suikers (gluciden) Energie /
Vetten (lipiden) Energie Opbouw
Eiwitten (proteïnen) Enzym/hulpstof Opbouw
Mineralen Enzym/ hulpstof /
Vitaminen Enzym/ hulpstof /




Gluciden

= suikers
= koolhydraten (KH)

Bv. zetmeel, glucose, pectine, …

Indeling: monosachariden (MS), disachariden (DS), Polysachariden (PS)

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