Question

In a patient with ___________ an infusion of ________ saline could be therapeutic or helpful. A. hypernatremia, hypertonic B. hyponatremia, hypertonic C. hyponatremia, hypotonic

Hypokalemia and hyperkalemia can both cause decreased excitability (of excitable cells). A. True B. False

The way hypokalemia and hyperkalemia affect excitability is both cause Na+ channels to remain inactivated for a prolonged (or a long) time. A. True B. False

Answer 1

And. 1 option b is correct. I.e the patient with hyponatremia an infusion of hypertonic saline is therapeutic helpful

Exp. As the level of sodium is aready less in blood stream so saline having hypertonic amount of sodium will be beneficial

And. 2 option a is correct i.e. Hypokalemia and hyperkalemia can both cause decrease excitability of cells.

Exp. Since there is no action potential there is no excitation of cells

Ans 3 option a i.e both hypo and hyperkalemia affect excitability as both cause sodium channel remain inactivated for prolonged time

Exp but in hyperkalemia it is due to depolarization of the membrane and in hypokalemia it is due to hyperpolarisation of the membrane