Nervous Tissue Flashcards
Are glands and adipose tissue part of the nervous system?
Yes, so are skeletal smooth and cardiac muscle
Cells of the nervous stem
Neurone s and neuroglia/ glia cells
What is the function of glial cells?
Protect, provide nutrients and immune function to neurones
Why can’t neurones be replaced after loss to injury
Lack centrioles so cannot mitosis. But if the cell body remains viable, axons and dendrites ie parts of the neurone can regenerate
Neurones are derived in embryogenesis from primitive neuroblasts . Neurones are terminally differentiated cells that, for all practical purposes, do not regenerate in the event of cell death. Studies have shown cell division in neurones in the adult brain, although the biological significance of this remains uncertain. However, regeneration of axons and dendrites can occur in the event of damage, provided the neurone cell body remains viable. This is the basis of nerve grafting used to treat peripheral nerve injuries.
What are the ribosome rich sites of active protein synthesis in a neurones
Nissl bodies are accumulations of rER
Gray matter
Is the axons in PNS myelinated or not
Both.
Are the axons in CNS neurones myelinated or not.
Yes
Classify the 6 different types of glial cells
CNS
Oligodendrocytes
Atrocities
Micrglia
Ependymal cells
PNS
Satellite cells
Schwann cells
3 types of neurones structures
Unipolar multipolar pseudounipolar
Most motor neurones are what type of neurons
Multipolar
Dorsal root ganglia is what type of neurone
Pseudo unipolar
Most sensory neurones are what type of neurone
Pseudo unipolar
What occurs at terminal boutons
Electrical signal is converted to a chemical signal
Name of the cell body of neurones
Perikaryon
Which type of glial cell is Ciliated
Ependymal
