Drugs for Cytopenia: Iron,B9,B12

Drugs for Cytopenia: Iron,B9,B12 | Quizalize

145 questions

Hematopoiesis refers to the production of:

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Approximately how many new blood cells are produced daily in a normal adult?

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The primary site of hematopoiesis in adults is the:

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Hematopoiesis requires all the following EXCEPT:

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Deficiency of essential nutrients or growth factors results in:

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The most common deficiency related to hematopoiesis is:

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Iron deficiency anemia typically produces:

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Iron forms the central component of:

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The main clinical symptoms of chronic anemia are due to:

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Common cardiovascular adaptations to chronic anemia include:

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Free inorganic iron is considered toxic because the body:

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The central regulator of iron absorption and release is:

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Hepcidin inhibits iron release by acting on:

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Most iron used for hematopoiesis comes from:

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Normal dietary iron absorption in healthy adults is:

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Iron absorption is greatest in the:

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Heme iron is absorbed more efficiently because it:

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Non-heme dietary iron must be reduced to Fe²⁺ by:

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Transferrin transports iron by:

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Serum ferritin levels are clinically useful because they:

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ntestinal absorption of heme-bound iron occurs via:

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After export through ferroportin, iron is transported in the blood primarily as:

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The transferrin–iron complex enters erythroid precursors by:

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Macrophages contribute to iron homeostasis by:

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High hepatic iron stores trigger increased hepcidin, leading to:

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The ONLY clinical indication for iron preparations is:

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Iron deficiency anemia typically presents as:

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Population with increased iron requirements:

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Most common source of iron loss in men/post-menopausal women:

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Unexplained iron-deficiency anemia in adults should prompt evaluation for:

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Oral iron is preferred because it:

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Patients with advanced CKD on hemodialysis often require:

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Ferrous salts are preferred orally because:

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To rapidly correct deficiency, elemental iron intake should be:

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Oral iron therapy should continue for 3–6 months to:

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Common adverse effects of oral iron include:

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Black stools caused by oral iron:

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Parenteral iron is indicated when:

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A small test dose is required before iron dextran because of risk of:

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High-molecular-weight iron dextran is associated with:

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Sodium ferric gluconate and iron sucrose differ from iron dextran because they:

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Ferumoxytol may interfere with:

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Acute iron toxicity most commonly occurs in:

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First-line treatment for acute iron poisoning includes:

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Chronic iron overload without anemia is best managed by:

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The average adult storage pool of vitamin B₁₂ is approximately:

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Vitamin B₁₂ deficiency develops slowly because:

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Methylcobalamin is required for conversion of:

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Failure of N⁵-methyltetrahydrofolate to convert to tetrahydrofolate in B₁₂ deficiency leads to:

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Accumulation of methylmalonic acid in serum indicates impaired activity of:

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Neurologic damage in B₁₂ deficiency is:

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A strict vegan may develop vitamin B₁₂ deficiency after:

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The most common cause of vitamin B₁₂ deficiency is:

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Pernicious anemia results from:

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Patients with ileal resection fail to absorb B₁₂ because:

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Elevated serum methylmalonic acid and homocysteine support diagnosis of:

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Hydroxocobalamin is preferred over cyanocobalamin because it:

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Standard initial parenteral vitamin B₁₂ therapy consists of:

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Long-term treatment for irreversible B₁₂ deficiency requires:

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Folic acid supplementation alone in unrecognized B₁₂ deficiency may:

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A 68-year-old with paresthesias, macrocytosis, and ↑ methylmalonic acid — impaired step:

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In vitamin B₁₂ deficiency, folate becomes trapped as N⁵-methyl-THF because:

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Lab profile BEST distinguishing B₁₂ from folate deficiency:

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A patient with long-standing B₁₂ deficiency receives folic acid alone. Expected outcome:

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Storage of vitamin B₁₂ lasts years because:

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Pernicious anemia is most strongly associated with:

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A patient with Crohn’s disease involving terminal ileum develops macrocytosis due to:

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Clinical feature LEAST likely in early B₁₂ deficiency:

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A strict vegan develops B₁₂ deficiency after many years because:

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Elevated methylmalonic acid indicates deficiency of:

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Which finding confirms B₁₂ deficiency rather than folate deficiency?

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Hydroxocobalamin is preferred over cyanocobalamin because it:

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A patient post-gastrectomy requires lifelong B₁₂ because:

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Neurologic injury in B₁₂ deficiency is most closely linked to impaired:

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Schilling test showing low B₁₂ absorption NOT corrected by IF indicates:

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Macrocytic anemia with normal methylmalonic acid suggests:

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B₁₂ deficiency may present without anemia because:

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Best long-term therapy for irreversible B₁₂ deficiency:

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Initial replacement for severe symptomatic deficiency should be:

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Elevated homocysteine in B₁₂ deficiency occurs because:

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Vitamin B₁₂ required for methyl transfer as:

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Enzyme converting dUMP → dTMP:

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The methylfolate trap occurs due to lack of:

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Conversion of L-methylmalonyl-CoA → succinyl-CoA requires:

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DNA synthesis using folates requires production of:

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Homocysteine → methionine requires:

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Dietary folic acid must be reduced to dihydrofolate and then THF by:

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MMA accumulation in B₁₂ deficiency results from failure of:

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Serine-glycine cycle contributes to formation of:

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Link between folate and B₁₂ metabolism due to:

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Primary biochemical role of reduced folates:

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Folic acid is composed of pteridine, PABA, and:

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Enzyme reducing folic acid to dihydrofolate:

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THF cofactors are essential for synthesis of:

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Body stores of folate are low; deficiency develops within:

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Dietary folates must be deconjugated before absorption by:

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The site of absorption of unaltered folic acid is the:

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Inside cells, N⁵-methyltetrahydrofolate converts to THF requiring:

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The dTMP synthesis cycle consumes THF because the cofactor is oxidized to:

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Continued DNA synthesis in rapidly dividing tissues requires regeneration of THF by:

100

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Methotrexate causes folate deficiency by inhibiting:

101

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Folate deficiency causes:

102

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Unlike vitamin B₁₂ deficiency, folate deficiency:

103

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Most reliable diagnostic indicator of folate status:

104

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Increased folate requirements occur in all EXCEPT:

105

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Maternal folate deficiency is strongly associated with:

106

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Long-term therapy with which drug may cause folate deficiency?

107

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Oral folic acid dose sufficient to correct deficiency in most patients is:

108

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Parenteral folic acid is rarely required because:

109

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Folate supplementation is recommended in high-risk groups including:

110

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Hematopoiesis is regulated primarily by:

111

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Platelet production is stimulated by:

112

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Erythropoietin is produced mainly by:

113

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EPO release is stimulated by:

114

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Anemia of chronic disease is associated with increased:

115

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Functional iron deficiency occurs when:

116

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Ferritin is primarily stored in:

117

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Excessive iron absorption occurs in:

118

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Gold standard test for iron stores (rarely done):

119

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Low MCV with low ferritin suggests:

120

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Low MCV with normal ferritin suggests:

121

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High MCV with low B₁₂ indicates:

122

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Reticulocyte count increases in:

123

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Reticulocyte count decreases in:

124

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Thrombopoietin is produced mainly in the:

125

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Platelets are derived from:

126

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Normal platelet lifespan is:

127

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RBC lifespan in healthy adults averages:

128

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Hemoglobin synthesis requires iron, globin, and:

129

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Iron deficiency initially presents with:

130

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Transferrin saturation is calculated using:

131

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Target cells are commonly seen in:

132

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Koilonychia is associated with:

133

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Glossitis is characteristic of:

134

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Pica may be present in:

135

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Increased TIBC is characteristic of:

136

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Decreased TIBC is characteristic of:

137

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First lab abnormality in iron deficiency:

138

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Serum iron is highest in:

139

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Erythropoiesis requires which trace element?

140

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Zinc deficiency may impair:

141

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Copper deficiency may cause:

142

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Anemia of chronic disease features:

143

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Most common cause of microcytic anemia worldwide:

144

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Lead poisoning inhibits:

145

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