Preganglionic parasympathetic fibers are_______________?
A. Somatic only
B. Parasympathetic
C. Sympathetic
D. Cholinergic
Medical Mcqs
Respiratory center is situated in_______________?
Respiratory center is situated in_______________?
A. Medulla oblongata
B. Sal cord
C. Midbrain
D. Hypothalamus
Pain sensation from the lateral extremities is transmitted by________________?
Pain sensation from the lateral extremities is transmitted by________________?
A. So thalmamic tract
B. Dorsal column
C. Corticosal tract
D. Socerebellar tract
Pain is conducted by________________?
Pain is conducted by________________?
A. A-alpha fibers
B. A-beta fibers
C. A-gamma fibers
D. A-delta fibers
Stimulation of baroreceptors results in_______________?
Stimulation of baroreceptors results in_______________?
A. Increase in heart rate
B. Decreased vagal discharge
C. Increased sympathetic discharge
D. Decrease in blood pressure
2nd heart sound is characterized by all except______________?
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
Heart muscle, true are all except_______________?
Heart muscle, true are all except_______________?
A. Act as syncytium
B. Has multiple nuclei
C. Has gap junctions
D. Has branching
Isovolumetric relaxation ends immediately after________________?
Isovolumetric relaxation ends immediately after________________?
A. AV Valve closes
B. When ventricular pressure falls below aortic pressure
C. When ventricular pressure falls below atrial pressure
D. None of the above
Ventricular muscle receives impulses directly from the_______________?
Ventricular muscle receives impulses directly from the_______________?
A. Purkinje system
B. Bundle of HIS
C. Right and left bundle branches
D. AV node
Distribution of blood flow is mainly regulated by the________________?
Distribution of blood flow is mainly regulated by the________________?
A. Arteries
B. Arterioles
C. Capillaries
D. Venules