470.All potentiate digoxin toxicity except

a.Hyperkalemia
b.Hypomagnesia
c.Hypercalcemia
d.Renal failure

Ans-a.Hyperkalemia
 Ref-Katzung pg 54-55   10th ed
Hyperkalemia is a protective factor as in the presence of hyperkalemia,the binding of digoxin becomes less

469.Substance P is released in response to pain in periphery

a.Nerve terminalis
b.Mast cells
c.Endothelium
d.Plasma

Ans-a.Nerve terminalis

Ref -Ganong's review of medical physiology 23 rd ed pg 112

468.The sulcular epethilium acts as a semipermeable membrane through which

a.Bacterial products pass into the gingiva.
b.Fluids from the gingiva seep into the sulcus.
c.Both of the above.
d.None of the above.


Ans-c. Both of the above
Ref-Caranza 9 th ed pg 23