A. The bundle of His
B. All cardiac muscle
C. The sinoatrial node
D. The cervical ganglion
Related Mcqs:
- Fastest conducting tissue in human heart _________________?
A. AV node
B. SA node
C. Bundle of His
D. Purkinje fibers - 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 - Cardiac output in L/min divided by heart rate equals_______________?
A. Cardiac efficiency
B. Cardiac index
C. Mean stroke volume
D. Mean arterial pressure - All of the following causes increase in heart rate except________________?
A. Halothane
B. Isoflurane
C. Sevoflurane
D. Desflurane - 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 - 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 - Parasympathetic stimulation of heart causes______________?
A. SA node decreases firing
B. Increased AV node excitability
C. Decreased ventricular contraction
D. Tachycardia - 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 - Heart muscle, true are all except_______________?
A. Act as syncytium
B. Has multiple nuclei
C. Has gap junctions
D. Has branching - 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
