chapter 14 Flashcards
what are the functions of the nervous system
primary communication and control system, gathers information, processes and evaluates information, Sends out a response
whats the ganglia
Cell body in PNS
what are the two subunits of the Sensory nervous system
Somatic sensory and Visceral sensory
what does the Visceral sensory get information from
Sensory from internal organs
Not something we know about (ex: blood pressure)
what does the Somatic sensory
get information from
Voluntary sensory (smell, taste, vision, etc)
what does the Sensory nervous system
do
send information to brain
what does the Motor nervous system
do
signals are sent from the brain to the body
what are the two subunits for the Motor nervous system
Somatic motor and Autonomic motor
what is the Autonomic motor
system
Information being sent to cardiac muscle, smooth muscle, and glands
what does the Somatic motor
do
Voluntary information being sent to skeletal muscle
what do dendrites and dendritic spines
recipes information
what do the axon and the axon hillock do
where the signal travels
what is the axon telodendria and the synaptic bulb
sends the signal out
whats the purpose of myelin sheath
insulates signal, keeps the electrical signal inside the axon
what disease destroys the myelin sheath
MS
what is the neurofibril node
gaps where there are n myelin sheath
what are the two types of neurons in the PNS
Sensory (afferent) neurons and Motor (efferent) neurons
what do Motor (efferent) neurons
do
generate a response, from CNS to muscle or gland
what do Sensory (afferent) neurons do
Respond to stimuli
From sensory receptors to CNS
what are the neurons in the CNS and what do they do
- Interneurons
- Receives info, processes it, stores (memory), choose response
what is myelin sheath made of
plasma membrane and phospholipids
what is myelin sheath made of in the CNS and the PNS
CNS: oligodendrocytes
PNS: neurolemmocytes
whats the difference between Myelination in the CNS and the PNS
In CNS
- Can go to different axons
- Multiple branches / wrappings
In PNS
- Only 1 wrapping per cell
what are the 4 glial cells in the CNS and what are their function
Astrocytes
- Get nutrients from blood steam
- Get rid of waste
- Filler cells
Ependymal cells
- Make CSF
Microglia
- Immune cells
Oligodendrocytes
- Myelin in CNS
