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Medical Mcqs

Unmyelinated fibres differ from myelinated fibers in that they ______________?

  • (A)  Have increased excitability
  • (B)  Have to nodes of Ranvier
  • (C)  Have no power of regeneration
  • (D)  Have no association of Schwann cells
Submitted By :Ali Uppal


The Sensory receptors serving the stretch reflex are classified as___________?

  • (A)  Proprioceptors
  • (B)  Nociceptors
  • (C)  Exteroceptors
  • (D)  Chemo receptors
Submitted By :Ali Uppal


Abdominal visceral pain is transmitted by ________________?

  • (A)  fibers
  • (B)  fibers
  • (C)  Parasympathetic fibers
  • (D)  Sympathetic fibers
Submitted By :Ali Uppal


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
Submitted By :Ali Uppal


Cardiac output is maximum to _________________?

  • (A)  Liver
  • (B)  Brain
  • (C)  Kidney
  • (D)  Heart
Submitted By :Ali Uppal


Effect on force of contraction of heart is_____________?

  • (A)  Chronotropic effect
  • (B)  Dromotropic effect
  • (C)  Bathmotropic
  • (D)  Ionotropic effect
Submitted By :Ali Uppal


Distribution of blood flow is mainly regulated by the________________?

  • (A)  Arteries
  • (B)  Arterioles
  • (C)  Capillaries
  • (D)  Venules
Submitted By :Ali Uppal


Ventricular muscle receives impulses directly from the_______________?

  • (A)  Purkinje system
  • (B)  Bundle of HIS
  • (C)  Right and left bundle branches
  • (D)  AV node
Submitted By :Ali Uppal


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
Submitted By :Ali Uppal


Heart muscle, true are all except_______________?

  • (A)  Act as syncytium
  • (B)  Has multiple nuclei
  • (C)  Has gap junctions
  • (D)  Has branching
Submitted By :Ali Uppal