Over the past 12 weeks, a 75-year-old man with a moderate aortic stenosis has developed shortness of breath and chest pains during exertion. He appears pale. Test of his stool for blood is positive. Laboratory studies show the following: hemoglobin 7.2 g/dL, and mean corpuscular volume 75. A blood smear shows microcytic, hypochromic erythrocytes. Which of the following is the most likely diagnosis?

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#Question id: 1292

#Unit 4. Cell Communication and Cell Signaling

Heparan sulfate, an example of a(n) _____________, aids in the activation of ____________.

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#Question id: 1812

#Unit 4. Cell Communication and Cell Signaling

What is the percentage of γδ T-cells bearing Vγ9, Vδ2 T-cell receptors in human adult peripheral blood?

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#Question id: 23160

#Unit 13. Methods in Biology

Texas is a fluorescent dye which emits a colour?

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#Question id: 3446

#Unit 11. Evolution and Behavior

Which of the following is least related to the others?

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#Question id: 358

#Unit 1. Molecules and their Interaction Relevant to Biology

Consider the following reaction at equilibrium: CO2 + H2O ⇔ H2CO3. What would be the effect of adding additional H2O?