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