Ferritin is a protein used to
store iron in the liver
absorb iron across intestinal cells
oxidize iron in the peroxisomes
transport iron in the blood
The Correct Answer is A
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
a) It is transported to the liver and becomes part of the bile: This applies to bilirubin, a byproduct of heme, not iron.
b) It is converted into stercobilin and gives color to feces: Stercobilin is derived from bilirubin, not iron.
c) It is used to synthesize proteins: While iron is important in protein function, its primary fate is recycling for hemoglobin.
d) It attaches to transferrin and is transported to bone marrow for use in hemoglobin synthesis. Iron is bound to transferrin in the blood and transported to the bone marrow for new red blood cell (hemoglobin) synthesis.
Correct Answer is D
Explanation
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.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.