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17 Cards in this Set
- Front
- Back
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Is more zinc absorbed from animal source, or vegetable source?
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animal
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Where is zinc absorbed?
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mainly in the jejunum
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What is required for zinc digestion and absorption?
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hydrochloric acid (because pH renders zinc easily extractable from food)
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What are some factors inhibiting the absorption of zinc?
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phytates
oxalates polyphenols fibre divalent minerals (calcium, copper, iron) |
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What are some factors enhancing the absorption of zinc?
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chelators or ligands such as citric acid, histidine, cystine
glutatione pancreatic secretions |
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How is zinc transported in the body
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delivered to tissues loosely attached to albumin.
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Where is zinc distributed and stored in the body?
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it is present in all tissues, organs, fluids, and secretions in the body.
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How is zinc excreted?
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Faecal zinc is main excretion
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What are some factors that increase zinc excretion
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excessive sweating
kidney disease diabetes semen burns |
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What are the primary functions of zinc?
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required for all cell growth and development, cell replication, bone formation, skin integrity, reproductive health, neurological health, cell-mediated immunity, antioxidant
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What roles does zinc have at a cellular level?
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1. catalytic role
2. structural role 3. regulatory role |
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List some zinc dependent enzymes
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Carbonic anhydrase (respiration)
Alkaline phosphatase Alcohol dehydrogenase Carboxpeptidase (protein digest) Amionpeptidase (protein dig) SOD |
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What is the function of zinc fingers?
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provide structural stability to the protein
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What are some symptoms of zinc deficiency?
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skin rashes, alopecia, chronic and severe diarrhoea, impaired wound healing
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Who is susceptible to zinc deficiency?
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infants and children
pregnant women malabsorptive disease strict vegetarians |
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List some nutritionally good sources of zinc
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oysters, beef, turkey
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What are the pros/cons of taking zinc away from food?
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pro: avoid interactions with food components and increase absorption
con: sulfate liquid may cause nausea when taken on an empty stomach |
