The hormone
The Correct Answer is {"dropdown-group-1":"B","dropdown-group-2":"B"}
A. Colony-stimulating factor; negative: colony-stimulating factors (CSFs) chiefly stimulate white blood cell production, not RBCs. The feedback characterization here is not applicable to erythropoiesis.
B. Erythropoietin; positive: erythropoietin (EPO) does stimulate RBC production, but the regulatory loop is negative feedback. So labeling it “positive” is wrong.
C. Erythropoietin; negative: EPO is the hormone that stimulates RBC production and it is regulated by a negative feedback mechanism based on tissue oxygenation.
D. Colony-stimulating factor; positive: CSFs affect leukocyte lines, and erythropoiesis is not regulated by a positive-CSF loop.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. autoimmune disease: when the immune system targets the body’s own tissues (e.g., Hashimoto thyroiditis), it is classified as an autoimmune disease.
B. tissue rejection reaction: tissue rejection refers to immune attack against a transplanted (non-self) organ, not the person’s own tissue.
C. secondary immune response: a secondary immune response refers to the heightened response on re-exposure to an antigen (memory response), not self-destruction of an organ.
D. type IV hypersensitivity: some autoimmune diseases involve cell-mediated (type IV) mechanisms, but autoimmune disease is the broader correct classification; not all autoimmune thyroid destruction is exclusively type IV.
Correct Answer is D
Explanation
A. stomach: the stomach is an organ of the alimentary canal (not an accessory organ).
B. pharynx: the pharynx is part of the alimentary canal (passageway), not an accessory organ.
C. esophagus: the esophagus is part of the alimentary canal (conduit), not accessory.
D. pancreas: the pancreas is an accessory organ (secretes digestive enzymes and bicarbonate into the duodenum).
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