Absolute refractory period in heart______________?

Related Mcqs:

1. The absolute refractory period of an action potential is due to _______________?

   A. Insufficient neurotransmitter
   B. Depletion of intracellular Na+
   C. Inactivation of Na+ k+ ATPase
   D. Voltage inactivation of the Na+ channel

2. Absolute period when whole heart is in diastole is______________?

   A. 0.7 seconds
   B. 0.3 seconds
   C. 0.7 seconds
   D. 0.4 seconds

3. Which of the following refractory is used to counteract most of the expansion________________?

   A. Quartz
   B. Cristobalite
   C. Tridymite
   D. Corundum

4. The normal absolute eosinophil count is_____________?

   A. 40 to 440 cells/C.mm
   B. 500 to 900 cells/C.mm
   C. 1200 to1500cells/C.mm
   D. 1500 to 2,000cells/C.mm

5. Disease characterized by insidious onset and by an absolute increased in number of circulating RBCs and in total blood volume ?

   A. Leukopenia
   B. Osler’s disease
   C. Mediterranean disease
   D. Aplastic anaemia

6. First heart sound occurs during the period of________________?

   A. Isotonic relaxation
   B. Isovolumetric relaxation
   C. Isovolumetric contraction
   D. Isotonic contraction

7. The teeth that are retained for the longest period of time are__________________?

   A. Maxillary incisors
   B. Maxillary canines
   C. Mandibular incisors
   D. Mandibular canines
   E. B & D

8. During the Window period of patient with AIDS_______________?

   A. ELISA IS – ve
   B. Western Blot is – ve
   C. Both are – ve
   D. PCR is – ve

9. Which of the following represents the serologic evidence of recent Hepatitis B virus infection during window period ?

   A. HBs Ag
   B. IgM anti – HBc
   C. Anti HBs
   D. None of the above

10. Which of the following medications shortens the recovery period of primary Herpetic gingivostomatitis ?

    A. Acyclovir
    B. Ziduvidine
    C. Kenalog in orabase
    D. All of the above