What are the most abundant agranulocytes?
Neutrophils
Eosinophils
Monocytes
Macrophages
Lymphocytes
The Correct Answer is E
A. Neutrophils: neutrophils are granulocytes (not agranulocytes) and are the most abundant white blood cells overall, but they are not an agranulocyte.
B. Eosinophils: eosinophils are also granulocytes involved in allergy and parasitic responses, not agranulocytes.
C. Monocytes: monocytes are agranulocytes and differentiate into macrophages in tissues, but they are less abundant than lymphocytes in peripheral blood.
D. Macrophages: macrophages are tissue-resident cells derived from monocytes (not usually counted as circulating agranulocytes) and are not the most abundant agranulocyte in blood.
E. Lymphocytes: lymphocytes are agranulocytes and are the most abundant agranulocyte in peripheral blood (higher % than monocytes).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. The chemical properties of the hormone: Chemical properties (lipid-soluble vs water-soluble) determine how a hormone reaches/enters cells and what type of receptor it uses, but they do not by themselves make a specific cell responsive.
B. The location of the gland that secretes the hormone: Where the hormone is secreted from does not determine whether a particular cell is responsive.
C. The location of the target cells in the body: A cell becomes responsive to a particular hormone only if it possesses specific receptors for that hormone. These receptors can be on the cell surface or inside the cell, depending on the hormone type.
D. The site where the hormone is secreted: The secretion site does not determine a cell’s responsiveness.
Correct Answer is {"dropdown-group-1":"D","dropdown-group-2":"D"}
Explanation
A. adrenal medulla; epinephrine: The adrenal medulla secretes epinephrine (and norepinephrine) for fight-or-flight effects (heart rate, glycogenolysis); it is not the main hormone that promotes Na⁺ and water retention.
B. pancreas; cortisol: The pancreas secretes insulin and glucagon, not cortisol; cortisol is produced by the adrenal cortex and has limited mineralocorticoid activity but is not the principal Na⁺/water-retaining hormone.
C. kidneys: corticosterone: The kidneys do not secrete corticosterone; corticosterone is an adrenal steroid (minor mineralocorticoid in some species).
D. adrenal cortex, aldosterone: Aldosterone (zona glomerulosa of the adrenal cortex) increases Na⁺ reabsorption and water retention and promotes K⁺ excretion in the kidney.
E. thyroid: calcitonin: Calcitonin from the thyroid lowers blood Ca²⁺ and has no role in Na⁺/water retention.
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