Unit 2- Flashcards
Depolarizations
Negative to positive voltage shift
What is the charge of the neuron at resting potential
Negative
Action potential
Shift change
Absolute refractory period
The period immediately following the firing of a nerve fiver when it cannot be stimulated no matter how great a stimulus is applied
Relative refractory period
Period shortly after the firing of a nerve fiver when partial depolarization has occurred and a greater than normal stimulus can create a second impulse
All or non law
The strength of a response of a nerve cell is not dependent upon the strength of a stimulus
Synaptic pruning
Making room for new connections
Soma
Cell body
Dendrites
Receiver
Axon
Transmitter
Myelin sheath
Insulter
Terminal buttons
Storage
Neurotransmitter
Terminal buttons
Synapse
Junction
Glia
Glue of neuron
Medulla
Attaches to spinal cord
Unconscious function and control
“The bridge”
Pons
Pons
Fibers that connect brainstem to cerebellum
What does the pons control
Sleep
Arousal
Breathing
Cerebellum
“Little brain”
Acetylcholine
Skeletal muscles
Attention
Arousal
Memory
What is ach stimulated by
Nicotine
What is associated with ACh
Alzheimer’s
Dopamine
Voluntary movement