Brain Flashcards
Name the function of nervous system
Sensory imput
Integrating information
Controlling muscles
Maintaining homeostasis
Mental activity
What type receives information
Afferent
What type sends out actions
Efferent
Group of neurons
Nerve
What are the 2 divisions of nervous system
CNS
PNS
Group of cell body’s
Ganglia
PNS controls/ parts
All other nerves than brain and spinal cord
CNS controls/parts
Brain and spinal cord
Independent network of neurons that control something
Pexious
Section Giving information to brain
Sensory
Section taking orders from brain
Motor
Balance coordination section
Kinesthetic
Pain / gut feeling section
Visceral
Mostly voluntary skeletal muscle mover
Somatic
Involuntary muscle and smooth muscle
Autonomic
ANS fight or flight/ heart rate faster
Sympathetic
ANS heart rate slower
Parasympathetic
ANS controls digestion
Enteric
Number of layers of CNS
3 layers
Covering over the brain and spinal cord
Meninges
Attached layer inside of the skull
Dura Mater
Folds in the dura mater that hold the brain in place
Rural folds
Space between vertebrae duramater
Epidural space
Blood vessels that look like spiderwebs
Arachnoid
Inside layer bound to the brain
Pia mater
Above layer of fluid gives friction
Lymph fluid
Below layer of fluid for shock absorption
Cerebral spinal fluid
Bacterial
Viral
Fungal
Meningitis
Intellectual functions/ thoughts brain section
Cerebrum
Deep in middle of brain section
Diencephalon
Influences mood section of brain
Thalamus
Brain section that maintains homeostasis
Hypothalamus
Bottom of brain that connects to spinal cord
Brain stem
Visual reflex section of brain
Midbrain
Relay between cerebrum and cerebellum section of brain
Pons
Heart rate and breathing section of brain
Medulla oblongata
Motor skills and coordination brain section
Cerebellum
Have nucleus and mitochondria’s
Cell body
Thin lines that receive information
Dendrites
Long line that bridges gaps
Axon
Is myelinated or unmyelinated faster
Myelinated
The ball at the end a axon that holds the neurotransmitter
Synaptic knob
Multidendrites
Multipolar
One dendrite
Bipolar
No dendrites
Unipolar
CNS that makes CSF
Ependymal
Projection that wraps around the brain blood vessels
Astrocyte
Act like white blood vessels
Microglia
Makes the myelin in the CNS
Oligodendrocyte
Makes myelin in the PNS
Schwann
Supports the cell body’s
Satellite
Potassium wants
Out
Sodium wants
In
Antions are
Negative charge
Resting membrane potential
-70mv
Not enough change to get a message through
Graded potentials
Minimum amount of depolarization to cause a chain reaction
Threshold
Closer to sending message
Depolarization
After depolarization restoration
Repolarization
Time when you can’t start a action
Refractory period