STATION 3 GLIAL CELLS NEUROGLIA 1 A Schwann cell can myelinate several axons

Station 3 glial cells neuroglia 1 a schwann cell can

This preview shows page 2 - 3 out of 3 pages.

STATION-3 GLIAL CELLS (NEUROGLIA) 1. A Schwann cell can myelinate several axons. True or false? False, oligodendrocytes can 2. Ependymal cells help cells circulate cerebrospinal fluid (CSF) 3. The nerve fibers of the CNS are myelinated by Oligodendrocytes cells 4. One Oligodendrocyte can myelinate many axons of neurons in the CNS 5. The nerve fibers of the PNS are myelinated by Schwann cells 6. Schwann cells are to the PNS as Oligodendrocytes cells are to the CNS Function Glial Cell PNS or CNS May be ciliated Ependymal CNS Anchor neurons to blood vessels Astrocytes CNS Phagocytizes microorganisms & neuronal debris Microglia CNS Surround neuron cell bodies in the PNS Satellite PNS Line central cavities of the brain & spinal column Ependymal CNS Support & brace neurons Astrocytes CNS Vital to regeneration of peripheral nerve fibers Schwann PNS Form Myelin sheath of the CNS fibers Oligodendrocytes CNS Several cells are needed to myelinate one axon in PNS Schwann PNS Surround nerve fibers in the CNS Oligodendrocytes CNS Guide migration of young neurons Astrocytes CNS Surround nerve fibers in the PNS Schwann PNS Form myelin sheath of the PNS fibers Schwann PNS STATION-4 NERVE IMPULSE (ACTION POTENTIAL) 1. In response to a change in membrane potential Na+ Voltage gated channels open 2. An influx of Na+ ions into the cell results in an Action potential 3. The ICF of a resting neuron is Negatively (-70mV) charged compared to its ECF 4. The ICF of a resting neuron has less Na+ ions compared to its ECF 5. The ICF of a resting neuron has higher concentration of K+ ion 6. K+ ions move outside the cell (along their concentration gradient)through open channels 7.
Image of page 2
Image of page 3

You've reached the end of your free preview.

Want to read all 3 pages?

  • Spring '13
  • routor

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes