| Intro:Nervous system | Nervous System: Neurons | Nervous System: Synapse | Nervous System: Myelination/ Axon Regeneration |
|---|---|---|---|
|
What is the general function of receptors?
Structures that monitor changes in internal and external environments.
|
What is the primary tissue of the Nervous system?
Nervous
|
What are the two types of Synapse?
Electrical and Chemical
|
What is myelination?
Process of wrapping an axon with myelin
|
|
What are the different types of effectors controlled by the N.S.?
Muscles and Glands
|
What are the five distinguishing characteristics of a neuron?
Excitability, Conductivity, Secretion, Extreme Longevity, Amitotic
|
What is the synaptic delay and when does it occur
Synaptic delay is the time it takes for the first events of transmission to occur in a chemical synapse.
|
What are myelin?
Myelin are several layers of membrane of glial cells
High lipid content gives glossy -white appearance Allows for faster action potential propagation |
|
what is an axon?
Long processes coming from the body
Contacts with other neurons, muscle cells, or glands. |
What is fast axonal transport
400mm per day movement along microtubules powered by motor proteins that split ATP
|
What are astrocytes?
Type of a CNS Glial Cell that is star shaped
|
What is a oligodendrocyte?
A type of Glial Cell
Large cells with thin extensions Extensions wrap around axons forming myelin sheath. |
|
What is a nerve made of?
A bundle of parallel axons in the PNS
|
What are the four structural categories of neurons
Multipolar, Bipolar, Unipolar, Anaxonic
|
What are the glial cells in the CNS?
Astrocytes, Ependymal, Microglia, Oligodendrocytes
|
What is Myelin produced by?
Neurolemmocytes in PNS and Oligodendrocytes in CNS
|
|
What is ganglia? (Ganglion)
a collection of neuronal bodies found in the voluntary and autonomic branches of the PNS
|
What is the function of interneurons and where are they located?
Interneurons are association neurons located within the CNS
|
What are the Glial Cells in the PNS?
Satellite Cells, Neurolemmocytes
|
What are the five stages of axon Regeneration?
Stage 1- Axon severed by trauma
Stage 2- Axon seals off and Swells Stage 3-Neurolemma and endoneurium form regeneration tube Stage 4- Axon regenerates guided by growth factors released by Neurolemmocytes 2-5mm/ day Stage 5- Innervation restored to effector or sensory receptor. |
Support Us on Ko-fi