Nervous System Flashcards
Control and Communication system in the body
Nervous system
many myelin sheath
can myelinate 3 axons at the same time
Oligodendrocytes
Type of Neurons that we can find in embryo and sensory neuron
unipolar - one process
Type of Neurons that we can find in receptor neuron, retina, olfactory receptors
bipolar - 1 axon 1 dendrite
Type of Neuron that we can find in Nervous System
Multipolar - 1 axon many dendrites
T or F
could it be possible to have double axon?
False, 1 axon lang
it is composed of neurons, nerves, supporting tissues
Nervous System
Main Difference of Oligodendrocytes to Schwann Cells?
Oligodendrocytes- forms myelin sheaths within the CNS
Schwann Cells- forms myelin sheath within the PNS
________ is composed of Nerves to the face, upper limb and lower limb and ganglia.
Peripheral Nervous System
________is composed of brain and spinal cord
Central Nervous System
basic unit of Nervous System
Neurons / Nerve Cells
support cells of neurons
Neuroglia / Glial Cells
it has no axon or dendrites
Neuroglia / Glial Cells
3 types of neurons structure
Unipolar
Bipolar
Multipolar
structural and functional unit of Nervous System
it has the properties of irritability and conductivity
Neurons
consist of cell body, dendrites(process fibers), and axon.
Neurons
Types of Processes of a Neuron
Axon Dendrites Perikaryon (Cell Body) Myelin Sheath Nodes of Ranvier
single elongated cytoplasmic extension
carries impulses AWAY from the cell body
Axon
carries impulses TOWARDS the cell body
Dendrites
found only in the gray matter of the brain, spinal cord, ganglia AKA Cell body
Perikaryon
protein synthesis?
Ribosomes
Parts of a Neuron?
Axon
Dendrites
Cell Body (Perikaryon)
white lipid, protein substance that surrounds the nerve fiber?
myelin sheath
Parts of Perikaryon?
Nucleus
Neurofibrils
Nissl Bodies
center of the perikaryon
nucleus
these are the fibers that forms network of cytoplasm
Neurofibrils
dumps of flat vesicular membranous organ containing ribosomes
Nissl Bodies
acts as insulator for neurons and increase the transmission rate of nerve impulses
Myelin Sheath
Covered, ______ White Fiber
Myelinated
Uncovered, _______ Gray Fiber
Unmyelinated
points of CONSTRICTION along myelin sheath
unmyelinated/insulated
Nodes of Ranvier
these are the delicate sheath formed Schwann cells around peripheral nerves
Neurolemma or Neurilemma
_____ means to bind
Glia
T or F
we can still produce myelin sheath without the Schwann cells
False, if there is no Schwann cells we cannot produce myelin sheath
_____ means membrane
lemma
3 functions of neurons
Afferent or Sensory
Efferent or Motor
Center or Internuncial or Intercalated
transmit impulses to CNS to effector organs
Efferent or Motor
transmit impulses from receptors to CNS
Afferent or Sensory
transmit impulses from part of the brain or Spinal Cord to another
AKA intermediate or association
Center or Internuncial or Intercalated
non neuronal cells of CNS & PNS
numerous than neurons
retains the ability to divide and bonds all the neurons
Neuroglia
5 types of Glial Cells?
Astrocytes Ependymal Microglia Schwann Cells Oligodendrocytes
protects us from bacteria entering the Nervous System and engulf bacteria and cell debris
Microglia
synthesis of myelin sheath in CNS
Oligodendrocytes
synthesis of myelin sheath in PNS
Schwann Cells
MAJOR SUPPORTING TISSUE
in contact to Blood Vessels like capillaries to form BBB ( Blood Brain Barrier)
Astrocytes
AKA wall
lines the ventricles of the brain and center canal of Spinal Cord
some produces cerebrospinal fluid and others with cilia
Ependymal
lines the cavities of the brain
Ependymal
