BIOLOGICAL BASES OF BEHAVIOR
NEUROTRANSMISSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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an abundance of sodium ions are found outside of the neuron in the extracellular space
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sodium ions leak out of the neuron into the extracellular space
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an abundance of potassium ions are found inside of the neuron in the intracellular space
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there is a charge difference between the inside and outside of a neuron of-70 mv
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the sodium/potassium pump is responsible for maintaining the transmembrane potential of a neuron
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Detailed explanation-1: -d) At the resting membrane potential, no ions enter or exit the cell. This is untrue because, at the resting membrane potential, sodium ions exit the cell while potassium ions are entering the cell.
Detailed explanation-2: -As positively charged ions are reduced, the concentration gradient potassium ion will further allow potassium ions to move out from the cell environment, thus making the membrane potential more negative. Therefore the correct option is B.
Detailed explanation-3: -Answer and Explanation: The statement that is true regarding the resting potential is d. A typical neuron has a resting potential of approximately-70 mV. This resting potential is accomplished by an active transporter in the membrane of neurons called the sodium-potassium pump (Na+/K+ ATPase).
Detailed explanation-4: -Answer and Explanation: The correct answer is option A. During the resting state of a neuron, the inside of the cell has a negative charge, as compared to the positive charge of the extracellular environment.