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

the Answer is A: .Sodium is needed to generate an action potential.

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Option A

Explanation: Action potentials are generated by the special types of the voltage gated channels which are embedded in the plasma membrane of the cell.

These channels are shut when the membrane potential is near zero and the voltage gated channels open only when the membrane potential is more than threshold voltage.

When the channels is open then they allow the flow of sodium ions which ultimately changes the electrochemical gradient which rises the membrane potential. This rise in membrane potential generate the action potential.

the answer is a. now keep my answer here.

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation: