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.

correct answer: biotic and abiotic limitations

carrying capacity is defined as the total number of an organism who can be supported in a given area within the natural resources limit and without harming or degrading the natural, economic or the cultural environment present for the future generations.

carrying capacity is determined by the limiting factors, which are known to affect the natural resources available. it may include water, nutrients, minerals, space, light etc.

explanation:

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