Which of the following is the most numerous white blood cell?
Neutrophil
Monocyte
Basophil
Eosinophil
The Correct Answer is A
A. Neutrophil: Neutrophils are the most abundant white blood cell type in peripheral blood and are primary phagocytes in acute bacterial infections.
B. Monocyte: Larger phagocytic cells that circulate less frequently than neutrophils and differentiate into macrophages in tissues.
C. Basophil: The least numerous leukocytes that release histamine and other mediators during allergic responses.
D. Eosinophil: Involved in parasitic defense and allergic reactions; present in lower numbers than neutrophils.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Parathyroid hormone (PTH): Raises blood calcium by stimulating bone resorption and increasing renal calcium reabsorption.
B. Insulin: Regulates blood glucose and has metabolic effects, but it does not lower blood calcium.
C. T3/T4: Thyroid hormones that regulate metabolism broadly, not the primary hormones for lowering blood calcium.
D. Calcitonin: Secreted by the thyroid (C cells) and lowers blood calcium by inhibiting osteoclast activity and promoting calcium deposition in bone.
Correct Answer is D
Explanation
A. Fundus: The rounded top portion of the uterus, located opposite the cervix, not the connection to the vagina.
B. Fallopian tube: Connects to the uterus at the uterine horns and transports ova; it is not the part that opens into the vagina.
C. Body: The main central portion of the uterus (corpus) situated between the fundus and cervix; it does not directly open into the vagina.
D. Cervix: The lower uterine segment that projects into the vaginal canal and forms the direct connection between the uterus and vagina.
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