19.2 Flashcards
The ventricles and central canal of the spinal cord are lined by ___ cells (low ___ or ___ cells).
Ependymal cells - low columnar or cuboidal cells.
Some ependymal cells are ___.
Ciliated
Ependymal cells are different to epithelial cells in that they have no ___ ___.
Basement membrane.
The three components of the cytoskeleton are ___, ___ ___ and ___
Actin, intermediate filaments and microtubules.
In neurons, there is a high level of ___ production - in cytology/histology you can see ___ bodies.
Protein production.
Nissl bodies - rough ER and free ribosomes.
Glia are excitable - there are modulations in intracellular ___ (___ waves).
Calcium!
Calcium waves.
Glia communicate like neurons by releasing ___.
Gliotransmitters
Neurons are ___ by the glial calcium wave.
Inhibited
___ are the main myelinating cells in the CNS and ___ ___ are the main myelinating cells in the PNS.
Oligodendrocytes in CNS.
Schwann cells in PNS.
The processes from oligodendrocytes wrap around parts of ___ axons.
Multiple!
Schwann cells wrap around __ axon only.
One!
Myelin ___ axon diameter and increases speed of ___.
Increases axon diameter and increased speed of conduction.
