Question

Neurons have an imbalance of _______ and _______ across the cell membrane, which is essential for ________________ to be transmitted.

1. chloride (Cl); potassium (K); action potentials

2.sodium (Na); potassium (K); action potentials

3.potassium (K); calcium (Ca); neurotransmitters

4. electrolytes; electricity; neurotransmitters

Answer 1

• For generation of action potential or impulse, sodium and potassium ions are necessary.
• It happens when a neuron is excited and stimulus reaches the threshhold, then sodium channels open and sodium ions move out of the cell and this is called depolarization phase and this is followed by repolarization phase, where potassium ions move back to cells and finally the sodium potassium transporter reestablish the resting potential.
• So, the correct option is 2
• Neurons have an imbalance of sodium and potassium across the cell membrane, which is essential for action potentials to be transmitted.