What is the iron-containing component of a red blood cell?.
Hemoglobin.
Hematocrit.
Cytoplasm.
Nucleus.
The Correct Answer is A
Choice A rationale:
Hemoglobin is an iron-containing biomolecule that binds oxygen and is responsible for the red color of the cells and the blood. -
Choice B rationale:
Hematocrit is not an iron-containing component, but rather a measure of the proportion of blood volume that is occupied by red blood cells. -
Choice C rationale:
Cytoplasm is the fluid inside the cell where cellular components are suspended, but it does not contain iron. -
Choice D rationale:
The nucleus is not present in mature red blood cells.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
hoice A rationale:
External intercostals assist in inspiration by elevating the ribs and expanding the chest cavity.
Choice B rationale:
Abdominals are not the main muscles responsible for pulmonary ventilation.
Choice C rationale:
Internal intercostals assist in forced expiration.
Choice D rationale:
The diaphragm is the main muscle responsible for pulmonary ventilation.
So, the correct answer is Choice D, after analyzing all choices.
Correct Answer is {"dropdown-group-1":"B"}
Explanation
Choice A rationale:
Viruses are pathogens that the immune system defends against, not components of nonspecific immunity.
Choice B rationale:
Lysozyme is an enzyme found in mucus, tears, and saliva that destroys bacteria, contributing to nonspecific immunity.
Choice C rationale:
Lysol is a brand of cleaning products and is not found in mucus, tears, or saliva.
Choice D rationale:
Immunoglobulins are antibodies produced by the immune system, not components of mucus, tears, or saliva.
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