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Flashcards in Zinc Deck (28):
1

whats the body distribution of zinc?

2-3g

2

where is zinc mainly located in the body?

liver, muscle, bone

3

where is there a small amount of zinc in the body?

eye and prostrate gland

4

what is brass an alloy of?

copper/zinc

5

what releases zinc to albumin and transferrin for transport to the rest of the body?

metallothionein

6

zinc is a constituent of how many enzymes?

60

7

what are the functions of zinc?

constituent of 60 enzymes, maintains integrity of skin, improves wound healing (with poor zinc status), necessary for taste, mobilizes vitamin A from liver, essential for reproduction and growth, helps prevent toxicity of other minerals

8

what does zincs function as a constituent of 60 enzymes do?

CO2 carrier, synthesis of DNA/RNA, breaks down alcohol

9

what does zinc do with its function in the synthesis of DNA/RNA?

zinc fingers (transcription), makes protein

10

what does zinc do with its function of skin integrity?

prevents dermatitis

11

when does zincs function of improving wounds work?

when zinc status is poor

12

why is zinc necessary for taste?

zinc proteins in saliva

13

what does zinc do with its function of mobilizing vitamin A from the liver?

zinc is component of retinol-binding protein, growth and differentiation of tissues

14

what does zinc do with its function in reproduction and growth?

bound to RNA as stabilizer (influences protein synthesis), if deficiency during pregnancy - not maintained or fetal malformation

15

what does zinc do with its function of preventing toxicity of other metals?

competition for absorption, lead and copper

16

what happens with a zinc deficiency?

impaired growth, lack of sexual maturation in males, dermatitis, hair loss

17

what happens in early pregnancy with zinc deficiency of impairments in growth?

fetal malformation, miscarriage

18

what happens in late pregnancy with zinc deficiency of impairments of growth?

retarded growth; decreased DNA and stress tolerance, increased aggression; impaired avoidance conditioning

19

what happens in childhood with a zinc deficiency in impairments of growth?

retarded growth

20

what happens in adolescence in zinc deficiency with impairments of growth?

retarded growth, delayed sexual maturation in males

21

what is zinc essential for in the brain?

development and functioning of brain, zinc dependent enzymes and neurotransmitters play a role in the central nervous system, may in turn affect cognition

22

what can zinc deficiency in animals lead to?

structural malformations in the brain, changes in enzymes and proteins important for neurotransmitters, behavioral problems (reduced attention, memory, ability to learn)

23

what did human studies in zincs link to cognition say?

emerging research on human models supports a beneficial role for zinc in human cognitive development and functioning

24

what are the details of zinc deficiency in older adults?

ages 65-90; dietary zinc linked to cognitive function, low levels of zinc in blood and brain tissues or patients with alzheimer's

25

what are the details of zinc and the common cold?

one study found lozenges decreased length of colds by 50% but no effect on fever, zinc as zinc gluconate was effective in 400 subjects but not zinc acetate, other studies show its no more effective than placebo (sugar pill)

26

whats the RDI for zinc?

M (11 mg)
W (8 mg)

27

whats the difference in zinc absorption from beef to cereal?

much higher absorption with beef

28

what are the main food sources of zinc?

all protein foods except egg white; meats, oysters, legumes (poor availability)