In nerve , the magnitude of the action potential overshoot is normally a function of the______________?

Related Mcqs:

1. All of the following structures are associated with branches of the trigeminal nerve EXCEPT the______________?

   A. Foramen ovale
   B. Foramen rotundum
   C. Superior orbital fissure
   D. Stylomastoid foramen

2. Resting membrane potential of nerve fiber is_______________?

   A. -70 mv
   B. -90 mv
   C. -55 mv
   D. + 35 mv

3. The hypoglossal nerve is the motor nerve to all of the muscles of the tongue except, the____________?

   A. Genioglossus
   B. Palatoglossus
   C. Superior longitudinal muscle
   D. Inferior longitudinal muscle

4. The absolute refractory period of an action potential is due to _______________?

   A. Insufficient neurotransmitter
   B. Depletion of intracellular Na+
   C. Inactivation of Na+ k+ ATPase
   D. Voltage inactivation of the Na+ channel

5. Upstroke of action potential would lead to________________?

   A. Net current in an outward direction
   B. Cell interior becomes more negative
   C. Cell interior becomes less negative
   D. None of the above

6. The nerve supply for motor action of buccinator______________?

   A. Facial nerve
   B. Mandibular nerve
   C. Maxillary nerve
   D. Auriculo temporal nerve

7. The viral action is differentiated from bacterial action by_________________?

   A. Interferon production
   B. Toxin production
   C. Lymphocytes production
   D. Neutrophils production

8. Limitation of inspiration by vagal lung inflation signals is called the______________?

   A. Autonomic reflex
   B. Bainbridge reflex
   C. Herring – Breur reflex
   D. Dynamic stretch reflex

9. The blood glucose level in diabetes mellitus is decreased by removal of the______________?

   A. Thyroid
   B. Parathyroids
   C. Anterior pituitary
   D. Posterior pituitary

10. The intrinsic factor for vitamins B12 absorption is produced in the______________?

    A. Liver
    B. Stomach
    C. Pancreas
    D. Duodenum