Class 4 Deck 1 (review) Flashcards
What are the 2 types of neural cells in the nervous system?
- Neuroglia
- Neurons
What do neuroglia cells do?
-Support regulate and protect neurons
What do neurons do?
-Process, transfer and store information
What are the neuroglia cells of the CNS?
- Asrocytes
- Oligodendrocytes
- Microglia
- Ependymal
What are the neuroglia cells of the PNS?
- Schwann cells
- Satellite cells
What do the astrocytes do?
- Supportive framework
- create BBB
- Regulate interstitial fluid around neurons
- Secrete chemicals for neuron formation
- Scar tissue after CNS injury
Where are the oligodendrocytes located? What do they do?
- Between neuron and blood vessels
- Create mylelin sheath
What do the microglia do?
-Phagocytize waste and pathogens
What type of cell is combined with endothelial cells to form the corcoid plexus and secrete CSF?
-Ependymal
What areas are lined with ependymal cells?
- Central spinal canal
- Ventricular cavaties
What surrounds the axon of neurons in the PNS and makes the neurilemma and myelin sheath?
Schwann cells
Neurilemma allow for potential __________ of damaged axons in the _____.
- Regeneration
- PNS
Satellite cells ______ groups of cell bodies of _______ within ________ of the PNS
- Support
- Neurons
- Ganglia
What is the structural unit of the nervous system? and what does it do?
- Neuron
- Receives and conducts stimuli
The neuron consists of what 3 things?
- Cell body
- Axon (only 1)
- Dendrite
Describe multipolar neurons?
- Many dendrites and one axon
- Found as Motor and interneurons
Describe Bipolar neurons?
- One dendrite One Axon
- Rare (found only in eye and ear)
Describe unipolar neurons?
- Dendrite (@ receptor) connect directly to spinal cord or brain.
- Sensory neurons
Most sensory neurons are what structure?
-Unipolar
Motor and Association neurons are what structure type?
-Multipolar
What 3 things do Association (interneurons) do?
- Transmit info between neurons
- Analyze input
- Coordinate output
What is the most common type of neuron?
-Association (interneuron)
The axons of neurons are bundled together to form ______ in the PNS and ____/______ in the CNS. These are referred to as ______ matter.
- Nerves
- Tract/Pathways
- White (myelinated)
cell bodies of neurons are clustered together into _______ in the PNS & ______/______ in the CNS. These are referred to as _______ matter.
- Ganglia
- Nuclei/Centers
- Grey (unmyelinated)
The ______ apart the nodes of ranvier are, the ______ the impulse is transmitted.
- Farther
- Faster
What makes up the “white matter”
-Groupings of myelinated axons
What makes up the gray matter?
- Groups of neuronal cell bodies
- Dendrites
- Synapes
