Neurophysiology Part One Flashcards
How do neurons communicate?
Through chemical and electrical signals
What is the difference between a chemical and electrical signal a neuron uses?
A chemical signal is between 2 neurons.
A electrical signal is WITHIN a single neuron
Is a neuronal conduction an electrical or chemical
It is an electrical signal
How is a neuronal conduction made?
Through an action potential
How is a chemical signal made?
through a Synaptic transmission by NTs
What is the specific voltage of a neuron at rest?
-70 mV
Why are Neurons polarized?
There is a charge difference between the inside and the outside of the cell. the inside is more negative than the outside
What are the 5 essential ions associated with a neuron?
- K -Potassium
- Na+ - Sodium
- Cl- chloride
- A- proteins/anions
- Ca+ calcium
Where are each of the 5 ions located at rest?
Na + and Cl- are located outside the cell while K+ and A- are located inside the cell. Ca2+ is also located outside
How do ions move in and out of the cell?
Through Ion channels
What are the 4 ionic forces that help to maintain the resting membrane potential?
- Diffusion
2, Selective Permeability
3.Electrostatic Pressure - Sodium - Potassium Pump
What is diffusion?
Particles are moving down concentration gradient
What is selective permeability?
only certain ions can pass through the membrane easily while others struggle
What is electrostatic pressure?
Similarly charged particles will repel while opposite particles will attract
Of the 4 ionic forces is considered active?
The Sodium-Potassium Pump is active while the other 3 are passive
