Question

Hyponatremia is a condition in which the sodium in the blood is too low. Uncontrolled spasms, which are sudden, involuntary contractions of muscles, are among the symptoms of hyponatremia. Why do they occur?

A.

Sodium is needed to generate an action potential.

B.

Sodium makes up most of the myelin sheath.

C.

Sodium is the signaling molecule that transmits impulses across a synapse.

D.

Sodium controls voluntary movement, and potassium controls involuntary movement.

Answer 1

D. Sodium controls voluntary movement, while potassium controls involuntary movement. We know this because muscular spasms such as a Charlie horse is due to a lack of potassium.

Answer 2

I think it's A: Sodium is needed to generate an action potential