Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
|
What are the two subdivisions of the nervous system
|
CNS, PNS
|
|
|
What are the main components of the PNS?
|
Nerves, ganglia, sensory receptor, enteric plexus
|
|
|
What are the subdivisions of the PNS?
|
Somatic, Autonomic, Enteric
|
|
|
What are the subdivisions of the autonomic motor PNS?
|
Sympathetic, parasympathetic
|
|
|
What are the functions of the nervous system?
|
sensory, integrative, motor
|
|
|
What are the structural classifications of neurons?
|
(multi, uni, bi) polar
|
|
|
What are the functions of astrocytes?
|
Structural support
blood-brain barrier secrete chemicals in embryo homeostasis of neuronal chemical environment of neurons role in learning and memory by influencing the formation of neural synapses |
|
|
What are the two types of astrocytes and where are they found?
|
Fibrous - white matter
protoplasmic - grey matter |
|
|
What is the function of oligodendrocytes?
|
Produce and maintain myelin sheath
|
|
|
What is the function of microglia?
|
phagocytosis of celllular debris
|
|
|
Which type of neuron has many dendrites?
|
Multipolar
|
|
|
Which neurons are fused together to form a long chain?
|
Unipolar
|
|
|
Where are bipolar neurons found?
|
The eye, inner ear, and olfactory area
|
|
|
Discuss the structure and function of ependymal cells
|
Shape - cuboidal to columnar
Single layer have microvilli and cilia produce and monitor CSF |
|
|
What purpose do Schwann cells have?
|
produce myelin sheath, neurolemma
|
|
|
What do satellite cells do and where are they found?
|
provide support and regulate the exchange of materials in the PNS
|
|
|
What two types of synapses are found within the nervous system?
|
Electrical (gap junction) and chemical
|
|
|
Where are gap junctions found?
|
heart, smooth muscle, brain
|
|
|
Name two advantages of gap junctions
|
faster communication, synchronized
|
|
|
Describe the mechanism for chemical interneuronal transmission
|
neurotransmitter, which is stored in synaptic bulbs and varicosities, is released and crosses the synaptic cleft to the postsynaptic dendrite
|
|
|
What are the two types of axonal transport and what direction does each travel in?
|
Slow - body to axonal terminals (anteriograde)
fast - both directions (retrograde and anteriograde) |
|
|
What is characteristic of perkinje neurons and where are they found?
|
Many dendritic processes
cerebellum |
|
|
Where are pyramidal neurons found and why are they named as such?
|
cerebral cortex
shape |
|
|
What are the factors for the speed of transmission in an axon?
|
temperature
diameter of axon myelination |
|
|
What are the steps for generation of APs?
|
Presence of concentration and voltage gradient
cell body reaches threshold depolarization (Na channels) repolarization (K channels) hyperpolarization (Na/K pump) rest period |
