Neuro Part 1
central nervous system (CNS)
brain and spinal cord
Everything outside the brain and spinal cord is part of the
peripheral nervous system (PNS)
The input side of the nervous system is
the sensory system
The output side of the nervous system
is the motor system
The somatic nervous system controls
<p data-start="700" data-end="721">Conscious control, Skeletal muscle, Voluntary movement</p> <br>
The autonomic nervous system controls
smooth muscle, cardiac muscle, glands
Two Branches of the autonomic nervous system:
parasympathetic system
Deals with resting body functioning
Two branches of the autonomic nervous system:
The sympathetic nervous system
controls fight or flight response system
Nervous Tissue
Neurooglia
specialized cells in the nervous system, these perform support functions
Four types of Neuroglia or glial cells:
Astrocytes
metabolic and structural support cells
Four types of Neuroglia or glial cells:
Microglia
Remove Debris
Four types of Neuroglia or glial cells:
Ependymal cells
cover and line cavities of the nervous system
Four types of Neuroglia or glial cells:
Oligodendrocytes
make a lipid insulation called myelin
Peripheral Nervous System (PNS)
Two types of neuroglia cells
Schwann Cells
make myelin for this system
Peripheral Nervous System (PNS)
Two types of neuroglia cells
Satellite Cells
Support cells
What do neurons do?
Carry out control functions of nervous system
Neurons
Neuron Body
Cell metabolism
Neurons
Dendrites
receive information from the enviorment
Neurons
Axon
Generates and sends signals to other cells
Neurons
Axon Terminal
emits signals from the cells
Neurons
Synapse
transmits signal to receiving cell
Classification of Neurons
Sensory Neurons
input
Classification of Neurons
Motor Neurons
output
Classifications of Neurons
Interneurons(associated neurons)
communication between neurons
Bipolar Neuron
Has two processes, one axon and one dedrite
Unipolar Neuron
Has one process, split into central and peripheral projection
Multipolar
has many processes, usually one axon and many dendrites
Depolarization
more positive, sodium in
Repolarization
Hyperpolarization
More negative, extra potassium out
cerebrospinal fluid(CSF)
acts as a shock absorber for both brain and spinal cord
The brain and spinal ca