Biconcave shape of RBC helps by___________________?

Related Mcqs:

1. Life cycle of RBC is_______________?

   A. 12 days
   B. 90 days
   C. 120 days
   D. One month

2. Site of RBC formation in 20 years old healthy male is____________?

   A. Flat bones
   B. Long bones
   C. Liver
   D. Yolk sac

3. Within the RBC hypoxia stimulates glycolysis by which of the following regulating pathways ?

   A. Hypoxia stimulates pyruvate dehydrogenase by increased, 2, 3DPG
   B. Hypoxia inhibits hexokinase
   C. Hypoxia stimulates release of all glycolytic enzymes from Band 3 on RBC membrane
   D. Activation of the regulatory enzymes by high PH

4. The most important buffer in RBC is____________?

   A. O2 Hb +Na hemoglobinate
   B. O2Hb +K hemoglobinate
   C. H2CO3 + KHCO3
   D. H2CO3 +NAHCO3

5. A patient reports with dyspnoea on slight exertion. He also has multiple petechial spots and spontaneous hemorrhage. His RBC count is less than one lakh/mm3 His hematocrit and hemoglobin is low. Most probable diagnosis is______________?

   A. Pernicious anemia
   B. Thalassemia
   C. Aplastic anemia
   D. Sprue

6. Increase in number of RBC is seen in ____________?

   A. Neutropenia
   B. Leukemia
   C. Polycythemia
   D. Anaemia

7. A young patient is hospitalized with petechiae of oral mucous membrane, marginal gingival hemorrhage and with a platelet count of 45,000/ cc The BT and Clot Retraction time are increased, RBC and TLC are normal He is suffering from________________?

   A. Infectious mononucleosis
   B. Thrombocytopenic purpura
   C. Leukemia
   D. Hemophilia

8. Which of the following muscle helps in depressing the mandible ___________?

   A. Temporalis
   B. Massetor
   C. Lateral pterygoid
   D. Medial pterygoid

9. Non acidic, nonionic protein which helps in enamel mineralization _______________?

   A. Tuftelin
   B. Sheathlin
   C. Enamelin
   D. Amelogenin

10. Scopolamine helps in________________?

    A. Motion sickness
    B. Hypertension
    C. Decreased secretions
    D. A & C