Neuroanatomy & physiology Flashcards
Which between neurons and glia cells can generate an electrical charge
Neurons
What are the functional units of the Nervous System
Neurons
True or False, neurons can rapidly switch their electrical charge
True
What nervous system are glia cells primarily found in
CNS, peripheral N.S
What type of function do Glia cell have
Glue
What types of glia cells are found in the CNS
Astrocytes, Oligodendrocytes, microglia
What types of glia cells are found in the PNS
Schwann cells
What type of glia cells create the myelin sheath
CNS= Oligodendrocytes, PNS= Schwann
What is the charges of neurons
Inside= more - then the outside
What is the electrical potential
Difference between inside and outside of the neuron
What is the resting potential of a neuron when it is not firing an AP
-60 mv to -70mv
What ions are more predominant outside of a neuron
Na+, Cl-, Ca2+
What time of ions are more concentrated inside the cell
K+
What are the 2 forces that allow molecules to move in and out of the cell
1) Diffusion
2) Electrostatic pressure
What is diffusion
Movement of ions from high to low concentration
What is electrostatic pressure
Like charge repel, different attract
What does the selective permeability of a membrane allow
Full movements of ions in and out
What are the 3 types of gates that represents Ion channels
1) Mechanically
2) Ligand
3) Voltage
Which of the 3 ion channel gates are the most common
Ligand
What do Ligand gated channels recognize
A spot on proteins
In ligand gates, what can bind to those protein spots to open the gates temporarily
Drugs
What does the Voltage gate depend on
Electrical state inside and outside the cell
Which gate is the most important for Action Potential
Voltage
What represents the hyperpolarization of a neuron
K+ channels open up, the charge inside the cell moves away from 0. Resting Potential becomes more -
