3. Biological Psychology
Cells of the Nervous System
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
When a neuron is at rest, the ions inside the cell are mostly _____ and the ions outside the cell are mostly _____.
A
positively charged; negatively charged
B
dead; alive
C
negatively charged; positively charged
D
small; large
Verified step by step guidance1
Understand the concept of a neuron's resting potential: A neuron at rest has a difference in charge across its membrane, known as the resting potential.
Identify the ions involved: The key ions are sodium (Na+) and potassium (K+), along with other ions like chloride (Cl-).
Recognize the distribution of ions: At rest, there is a higher concentration of potassium ions (K+) inside the neuron and a higher concentration of sodium ions (Na+) outside the neuron.
Determine the charge inside the neuron: Due to the presence of negatively charged proteins and a higher concentration of K+ ions, the inside of the neuron is negatively charged.
Determine the charge outside the neuron: The outside of the neuron is positively charged due to the higher concentration of Na+ ions.
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