The element necessary in the diet for proper thyroid function is
Calcium
Sodium
Bromine
lodine
Potassium
The Correct Answer is D
a) Calcium: Important for bones and muscle function, but not directly involved in thyroid hormone production.
b) Sodium: Maintains fluid balance and nerve function but is not essential for thyroid hormone synthesis.
c) Bromine: Has no known essential role in human nutrition or thyroid function.
d) Iodine: Iodine is a crucial component of thyroid hormones T3 (triiodothyronine) and T4 (thyroxine). Without iodine, the thyroid cannot synthesize these hormones.
e) Potassium: Important in nerve impulse transmission and muscle contraction, not thyroid function.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
a) Low level of iron concentration in the blood: Iron is necessary for hemoglobin synthesis, but it does not directly stimulate EPO production.
b) Low level of oxygen concentration in the blood: Hypoxia is the primary stimulus for EPO release, which then promotes red blood cell production to increase oxygen-carrying capacity.
c) Low number of red blood cells in the blood: While anemia can lead to hypoxia, it is the oxygen deficit (not RBC count itself) that directly stimulates EPO.
d) High number of red blood cells in the blood: This would decrease EPO production through negative feedback.
Correct Answer is A
Explanation
a) store iron in the liver: Ferritin is an intracellular protein that stores iron and releases it in a controlled fashion. It is primarily found in the liver, spleen, and bone marrow.
b) Absorb iron across intestinal cells: DMT1 (divalent metal transporter 1) and ferroportin are more directly involved in this.
c) Oxidize iron in the peroxisomes: Iron oxidation is not a function of peroxisomes, nor of ferritin.
d) Transport iron in the blood: Transferrin, not ferritin, is responsible for iron transport in plasma.
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