Brain/Neurons Flashcards
Dendrites
Receive info from other neurons
Nucleus
Middle of the cell hold DNA
Myelin Sheath
Protect the Axon and makes communication easier
Nodes of Ranvier
Gaps in myelin sheath
Axon
Carries info
Axon teminal
Bottom of neuron, sends messages to other neurons
Synapse
Gap between neurons, for neurotransmitters
Resting Potential
Inside axon (-) outside (+)
Stimulus threshold
Push needed to start action potential
Action potential
Electrical impulses,
channels open
(- to outside and (+) inside
Refectory Period
Repolarized to resting state
Afferent
Sensory to brain
Efferent
Motor from brain
Interneuron
Communicates between neurons
Glial cells
Feed, and take care of waste for neurons
presynaptic
sends
postsynaptic
recieves
Excitctory
increases neuron likely hood of firing
Inhibitory
Prevents neuron from firing.
Acetylcholine (AcH)
Voluntary movement
+ muscles issues (rigid)
- Alzheimer’s
Dopamine
“feel good”
+ Schizophrenia
-ADHD
Endorphins
Natural opioid
+ No warning of pain
- Feels pain
Serotonin
Natural mood stabilizer (sleeping, eating, mood)
+Mania
-Depression
GABA
Sleep cycle
+ Eating disorders
- Anxiety