Neurons Flashcards
What is the janitor in glia cells?
Micro glia
What are the differences and similarities between oligodendrocytes and Schwann cells?
Oli is in the CNS and Schwann cells are in the PNS. They both provide myelin.
What are the info cells of the body?
Neurons
What is the soma in a neuron?
It is the cell body
What happens at the terminal bouton?
Communication with other neurons
An ______ ________ is a change in electrical potential in a neuron which produced an electrical impulse.
Action potential
Sodium channels close
Potassium channels open
Inside becomes more negative
Which stage?
Repolarization
Is the brain mostly made up of glia cells or neurons?
Glia
Ion pumps
Returns membrane potential
Which stage?
Return to testing stage
-70mV
K+ inside
Na+ outside
What stage is this?
resting stage
How long does an a full action potential take?
1 millisecond
Which neurotransmitter acts as a connection between neurons and muscle?
Acetylcholine
_____ turns down activity of other neurons. ______ turns it up.
GABA and glutamate
What does epinephrine do?
Fight or flight
Which neurotransmitter controls you sleep, aggression, and appetite?
Serotonin
Neurotransmitter binds to them which sends “off” signal to not allow more neurotransmitters.
What is “them”?
Auto receptors
What do agonists do
Act like neurotransmitters
What do antagonists do?
Turn off neurotransmitters
A lot of potassium has left
Inside is more negative than it was at rest
“Overshot”
Which stage?
Hyper polarization stage
Sodium channels open
Inside becomes more positive
Threshold potential is reached and passed (-50 mV)
Which stage?
Depolarization stage
