Normally, the rate of the heart beat in a human is determined by _________________?

Related Mcqs:

1. Fastest conducting tissue in human heart _________________?

   A. AV node B. SA node C. Bundle of His D. Purkinje fibers...

2. The glomerular filtration rate of the human kidney may be determined by measuring the plasma clearance of______________?

   A. PAH B. Urea C. Inulin D. Glucose...

3. Cardiac output in L/min divided by heart rate equals_______________?

   A. Cardiac efficiency B. Cardiac index C. Mean stroke volume D. Mean arterial pressure...

4. All of the following causes increase in heart rate except________________?

   A. Halothane B. Isoflurane C. Sevoflurane D. Desflurane...

5. One of the obious consequences of alchol ( ethenol), ingestion in many individual is facial flushing and increased heart rate triggered off by alcohol getting metabolized to______________?

   A. Formaldehyde B. Acetaldehyde C. Propanaldehyde D. Butanaldehyde...

6. All the heart valves are open during which stage of cardiac cycle __________________?

   A. Systolic ejection B. Isovolumetric relaxation C. Isovolumetric contraction D. None of the above...

7. Parasympathetic stimulation of heart causes______________?

   A. SA node decreases firing B. Increased AV node excitability C. Decreased ventricular contraction D. Tachycardia...

8. 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...

9. Heart muscle, true are all except_______________?

   A. Act as syncytium B. Has multiple nuclei C. Has gap junctions D. Has branching...

10. 2nd heart sound is characterized by all except______________?

    A. Due to closure of semilunar valves B. Is occasionally split C. Has longer duration than 1st heart sound D. Marks the onset of diastole...