-
The essential mineral element in the structure of vitamin B-12 is
D) cobalt
-
Excesses of trace minerals
A) tend to accumulate in tissues
-
The chief determinant for the absorption of trace minerals is
C) the physiological need
-
True/False (support your answer with an explanation)
Foods of animal origin are more reliable sources of trace minerals than are foods of plant origin
True
-
About 70-80% of total body iron in an adult is located in
B) hemoglobin
-
The oxygen-carrying protein of the red blood cells is __________ The oxygen-holding protein of the muscle cells is _____________
-
___________is the short-term storage form of iron
C) Ferritin
-
The major function of iron in the body is to
B) transport oxygen from the lungs to all cells
-
The average life span of red blood cells is about
B) four months
-
Iron is lost from the body primarily through
C) sloughing of cells, urine, feces, and sweat
-
The average loss of iron is about _____________per day
D) 0.3 to 1.2 mg
-
The protein carrier required for iron transport in the blood is _________. It is normally_________% saturated with iron
-
The average rate of iron absorption is normally about
B) 18%
-
Of the groups listed below,____________are least vulnerable to iron deficiency
D) adult males
-
Iron deficiency anemia is described as
D) microcytic hypochromic
-
Iron deficiency is a state in which iron stores are __________. Test readings of percent transferrin saturation will____________while TIBC will
A) depleted; decrease; increase
-
Iron deficiency anemia is not caused by
C) alcoholism
-
Of the factors listed below, only_____________ is not a reason why alcoholics are more vulnerable than others to iron overload
B) the high iron content of alcoholic drinks
-
The rate of iron absorption form the gut is controlled mainly by
B) the iron status of the individual
-
Heme iron is present in
C) meat, fish, and poultry
-
True/False (support your answer with an explanation)
Non-heme iron is more soluble in alkaline condition and is more easily absorbed lower down in the gastrointestinal tract
False
Non-heme iron, in the form of ferrous iron, is more soluble in acidic conditions and is primarily absorbed in the duodenum
-
__________not inhibit iron absorption
C) orange juice does
-
True/False (support your answer with an explanation)
Heme iron has greater bioavailbility than does non-heme iron
True
-
The main biological function of zinc is as
C) a cofactor
-
___________is not a symptom of zinc deficiency
A) pernicious anemia
-
___________ do not have a high risk of marginal zinc deficiency
C) breast-fed babies
-
Of the foods listed below,____________is/are the richest source of zinc
D) oysters
-
Those at least risk of developing subclinical deficiencies are
C) male athletes
-
The best choice for a vitamin and mineral supplement, if needed, is
C) a multi-vitamin and mineral supplement that is close to the RDA level for each nutrient
-
Of the supplements listed below, ____________is/are potentially most detrimental to health
B) vitamins A and D
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