Unit 12 Check Your Recall cont.

Where are synaptic vesicles located?

Axon terminals

Ependymal cells

- ciliated cells in the CNS that line the hollow spaces of the brain and spinal cord - assist in forming cerebrospinal fluid and circulate it with their cilia

Schwann Cells

- create the myelin sheath around the axons of certain neurons in the PNS - 1 schwann cell can myelinate a segment of only one axon

Oligodendrocytes

- have long extensions that wrap around the axons of certain neurons in the CNS to form the myelin sheath - 1 oligodendrocyte can myelinate segments of several different axons

Astrocytes

- most numerous neuroglial cells type in the CNS - star shaped - anchor neurons and blood vessels using perivascular feet - maintain extracellular environment around neurons - assist in formation of the blood-brain barrier

Satellite Cells

- surround the cell bodies of neurons in the PNS - enclose and support the cell bodies - regulate the extracellular environment around them

Microglial cells

- very active phagocytic cells in the CNS - clean up debris surrounding neurons - degrade and ingest damaged or dead neurons

The main function of an axon is to _________________________.

generate and transmit signals in the form of action potentials.