Study 1 Flashcards
The PNS is derived from the Cell?
Neural crest cell
The DRG is made up what type of neurons?
Pseudounipolar
What myelinated the PNS?
Schwann cells
What is the functional cell for energy (ATP)?
Mitochondria
Multiple branches to the cell body that carries signals through brain/ spinal cord?
Multipolar
Cell bodies of the PNS are made up of?
Pseudounipolar or multipolar
Most common cell causing tumor?
Astrocytoma
Umbilicus is at what dermatome level?
T10
MS is caused by a defect of?
Autoimmune attack of myelin (Schwann cells?)
Forms of glycoproteins and lysosomes?
Golgi bodies
Thick sheath covering a fascicles and nerve fibers?
Perineurium
The minimum amount of neurons in a reflex?
2
In the ventricular zone, neurons are?
Pluripotent (stem cells)
Satellite cells are similar to what in the CNS?
Astrocytes
What produces CSF?
Ependymal cells
A strip of skin inner aged by a single spinal nerve?
Dermatome
The patellar reflex is an example of?
Myotactic 1a fibers
Crossed effect is an example of?
Withdrawal reflex aka flexor reflex
Type A axons are?
Largest in diameter
Type C axons are?
Slowest (unmyelinated)
The type of motor neuron responds to muscle stretch
Gamma
Golgi tendons are an example of?
Mechanoreceptors
Which of the following have free nerve endings?
Thermo receptors
Motor supply of a muscle spindle is by?
Gamma type neurons
Satellite cells cover neuronal cell bodies in the?
PNS
Multipolar neurons have several fibers from one?
Cell body
Covers only one fiber and surrounds neuronal fibers?
Endoneurium
Surrounds a fascicles?
Perineurium
Form glycoproteins and lysosomes?
Golgi bodies
Small unmyelinated sensory fibers that pick up pain, temp and touch?
C-fibers
Fat myelinated motor fibers?
Alpha fibers
Ventricular zone contains?
Pleuripotent cells
The marginal zone has either?
Neurons or glial cells
Cells that myelinayenthe PNS?
Schwann cells
Satellite cells are analogous to?
Astrocytes
A myelination disease?
Multiple sclerosis
An astrocytoma accounts for what percentage of brain tumors?
23%
A territory for, which a sensory unit can be excited?
Receptor field
Receive pain a temperature “thermoreceptors”?
Free nerve endings
A simple reflex contains how many neurons?
Two
A secondary sensory innervations that detects degree of stretch?
Flower spray endings
A knee jerk is what type of reflex?
Myotactic reflex - 1a fiber
Golgi tendon organs are found at?
Muscle tendon junctions
What type of fiber responds to muscle stretch in patella reflex?
Alpha
What myelinated the CNS?
Oligodendrocytes
The epidural space has?
Fat pad
The cauda equina is located at?
L2-S2
A flexor reflex withdrawal reflex is what type of effect?
Crossed effect
