0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
State of an unstimulated neuron's membrane?
Polarized
What is the Electrical condition of a plasma membrane of a resting neuron?
Polarized
A small deviation from the resting membrane potential that makes the membrane more or less polarized?
graded potentials
What is a nerve membrane at rest called?
When the neural membrane (neurolemma) is at rest it is said to have resting potential, polarized, and has a negative charge inside.
What can stick to magnets?
anything that can become polarized such as metals
What is membrane polarity?
-70 mV this potential difference in a resting neuron (Vr) is called the resting membrane potential, and the membrane is said to be polarized.
Explain what effect more cholesterol in the plasma membrane will have on the membrane?
the cholesterol will help to prevent the fatty-acid tails of the phospholipids bilayer from sticking together, which contributes to the fluidity of the plasma membrane.
When a resting nerve fiber is polarized sodium and potassium ions is higher on the inside of its membrane?
A resting nerve fiber is polarized because the concentration ofNa+ is higher on the outside and K+ is higher on the inside.
Describe the action of depolarization and repolarization?
Depolarization is due to the influx of Na+ which causes the cell's internal membrane to become more positive, leading to an action potential. Repolarization occurs when K+ leaves the cell causing the interior of the cell to become negative again.
Explain how polarized light is different from non-polarized light.?
In polarized light, the plane of the electrical (and magnetic) oscillations is the same for all photons (particles of light). For example, if the light is traveling away from you, all photons might have electrical oscillations that go up and down.
What model is used to explain the componets and properties of plasma membrane?
The model used to explain the components and properties of the plasma membrane is called the fluid mosaic.
In what way does the interior surface of a cell membrane of a polarized neuron differ from the external environment The interior is?
Negatively charged and contains less sodium
