A nurse is caring for a client who has contact dermatitis after exposure to poison ivy. The nurse recognizes that this condition is mediated by what type of cells?
B cells
T cells
T cells
Mast cells
The Correct Answer is B
Choice A reason:
B cells are not involved in contact dermatitis, as they do not produce antibodies or form immune complexes.
Choice B reason:
T cells are the type of cells that mediate contact dermatitis, which is a type of type IV hypersensitivity. T cells recognize the poison ivy antigens that bind to the skin proteins and release cytokines that recruit macrophages and other inflammatory cells. This leads to a delayed and localized reaction that manifests as erythema, edema, vesicles, and pruritus.
Choice C reason:
T cells are not the same as B cells, as they have different receptors and functions in the immune system.
Choice D reason:
Mast cells are not involved in contact dermatitis, as they do not express IgE antibodies or release histamine.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice D reason:
Malignant neoplasia of bone marrow cells. Leukemia is a type of cancer that originates from the abnormal and uncontrolled growth of hematopoietic stem cells or progenitor cells in the bone marrow. These cells can proliferate and differentiate into various types of blood cells, such as lymphocytes, granulocytes, monocytes, or erythrocytes. Leukemia can be classified by the type of cell involved (myeloid or lymphoid) and the rate of progression (acute or chronic).
Choice A reason:
Benign neoplasia of blood cells is not a correct term for leukemia, as leukemia is a malignant condition that can invade and destroy normal blood cells and tissues. Benign neoplasia of blood cells is a rare condition that involves the overproduction of normal blood cells, such as polycythemia vera or essential thrombocythemia.
Choice B reason:
Malignant neoplasia of blood cells is not a correct term for leukemia, as leukemia does not originate from blood cells, but from bone marrow cells. Malignant neoplasia of blood cells is a term that can be used for lymphoma, which is a type of cancer that originates from lymphocytes in the lymphatic system.
Choice C reason:
Benign neoplasia of bone marrow cells is not a correct term for leukemia, as leukemia is a malignant condition that can spread to other organs or systems. Benign neoplasia of bone marrow cells is a term that can be used for myelodysplastic syndrome, which is a condition that involves the abnormal development and maturation of bone marrow cells.
Correct Answer is ["B","C","E"]
Explanation
Choice A reason:
Restricting fluid intake is not an action that the nurse should take for a client who has hypernatremia. Fluid restriction can worsen hypernatremia by increasing the concentration of sodium in the blood. Fluid intake should be increased or replaced with isotonic or hypotonic fluids to dilute sodium and correct hypernatremia.
Choice B reason:
Monitoring neurological status is an action that the nurse should take for a client who has hypernatremia. Hypernatremia can cause neurological symptoms such as confusion, agitation, seizures, coma, and death due to cellular dehydration and brain shrinkage. The nurse should assess the client's level of consciousness, orientation, memory, behavior, and reflexes regularly and report any changes or deterioration.
Choice C reason:
Administering hypotonic IV fluids is an action that the nurse should take for a client who has hypernatremia. Hypotonic fluids have a lower concentration of solutes than normal body fluids and can help lower serum sodium levels by moving water into the cells from the blood vessels. The nurse should administer hypotonic fluids slowly and carefully to avoid fluid overload or cerebral edema.
Choice D reason:
Encouraging foods high in sodium is not an action that the nurse should take for a client who has hypernat
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