Learn Before
Pressures on Ions During Resting Potential
During the resting state, two main forces act on ions across the neuronal membrane. The first is diffusion, where ions move down their concentration gradient. Specifically, sodium (Na+), being more concentrated outside the cell, is driven inward, while potassium (K+), being more concentrated inside, is driven outward. The second force is electrostatic pressure, arising from the net negative charge inside the cell. This electrical gradient provides an additional force attracting positively charged ions like sodium into the neuron.
0
1
Tags
Behavioral Neuroscience
Psychology
Neuroscience (Neurobiology)
Social Science
Empirical Science
Science
Life Science / Biology
Biomedical Sciences
Introduction to Psychology @ OpenStax Course
Natural Science
OpenStax Psychology (2nd ed.) Textbook
OpenStax
Ch.3 Biopsychology - Psychology @ OpenStax
Psychology @ OpenStax
Related
Nernst Equation
Measuring Membrane Potential
Microelectrode
Goldman Equation
Sodium-Potassium Pump
Pressures on Ions During Resting Potential
Imagine a neuron is exposed to a substance that specifically blocks the protein pump responsible for moving three sodium ions out of the cell for every two potassium ions it moves in. Assuming ion channels still allow for some passive leakage, what would be the most likely consequence for the neuron's resting membrane potential over time?
Imagine a neuron is exposed to a substance that specifically blocks the protein pump responsible for moving three sodium ions out of the cell for every two potassium ions it moves in. Assuming ion channels still allow for some passive leakage, what would be the most likely consequence for the neuron's resting membrane potential over time?
Learn After
Consider a neuron in a stable, non-signaling state. The environment inside the cell has a net negative electrical charge relative to the outside, and the concentration of potassium (K+) ions is significantly higher inside the cell than outside. Based on these conditions, which statement best analyzes the two primary forces acting on potassium ions?
A neuron at rest has a high concentration of sodium ions (Na+) outside the cell and a high concentration of potassium ions (K+) inside the cell. The interior of the cell is negatively charged compared to the exterior. Based on this information, which statement best analyzes the combined influence of concentration gradients (diffusion) and electrical forces (electrostatic pressure) on these two ions?