Nutrients and health test 2

Question 1

2 forms of iron

Answer 1

heam and non-heam

Question 2

which form of iron is absorbed better

Answer 2

heme iron

Question 3

percent of heme iron absorbed

Answer 3

15-35%

Question 4

percent of non heme iron absorbed

Answer 4

2-20%

Question 5

Healthy adults absorb how much of iron in the diet

Answer 5

10-15%

Question 6

Iron absorption is high when

Answer 6

body iron stores are low

Question 7

what increases the absorption of non-heme iron

Answer 7

Meat products and vitamin C

Question 8

Non-heme iron is absorbed in the

Answer 8

in the duodenum and proximal jejunum

Question 9

heme iron is absorbed in the

Answer 9

lower in the small intestine

Question 10

Iron is transported how

Answer 10

bound to transferrin and enthrosites to tissue

Question 11

2/3 of the iron in the body is found in

Answer 11

is found in hemoglobin

Question 12

iron stored where in the body

Answer 12

30% in liver
30% in bonemarrow
40% in spleen and muscles

Question 13

iron is excreted how

Answer 13

during bleeding or menstration
1mg/day lost through:
o Feces
o Sweat
o Pealing of skin and hair
o Practically no losses in urine

Question 14

functions of iron 5

Answer 14

Important in cognitive function and study ability
Red bloodcell formation
Needed for normal functioning of immune
system
70% in Hemoglobin
Part of specific enzymes

Question 15

requirements for iron 13-18 years men

Answer 15

11mg

Question 16

requirements for iron 18-70 in men

Answer 16

8mg

Question 17

requirements for iron 14-18 for women

Answer 17

15mg

Question 18

requirements for iron18-50 for women

Answer 18

18mg

Question 19

requirements for iron pregnancy

Answer 19

27mg

Question 20

UL upper levels for iron

Answer 20

45mg

Question 21

Diet sources:
Heme iron:

Answer 21

Mostly animal sources – red meat, fish,
poultry

Question 22

Diet sources:
non- Heme iron:

Answer 22

Plant precuts like lentils and beans
Food is fortified from this form

Question 23

ron deficiency

Answer 23

Group at risk: babies < 2yr, girls during adolescence, pregnant teenagers, older adults and long-distance athletes
Hypochromic microcytic anemia

Question 24

iron toxicity

Answer 24

Accumulation of iron in the liver
Increased muscle ferritin
Oxidation of LDL-cholesterol
⇨ Cardiovascular complication
⇨ Hemosideroseis is an iron store problem –
genes cause increased absorption in people
with abnormally high iron intakes
⇨ Tissue damage occurs - it is called
hemochromatosis
⇨ Iron and infections – Iron deficiencies leads to
a decreased T-lymphocyte, iron is needed by bacteria: excessive amounts lead to risk of infection

Question 25

hg