5 Written Questions
5 Matching Questions
- Describe the anatomy of a nerve.
- What are the functions of a-fibers (alpha, beta, gamma, delta)?
- How does the body send signals over long distances?
- Describe the epineurium
- Describe the nodes of Ranvier
Sheath covering the entire nerve, contains nutrient blood vessels.
Interruptions in the myelin sheath.
- d Chemical messengers, electrical or a combination of the two. Peripheral nerves are constructed for electrical transmission that leads to a chemical messenger activation.
- e Motor, tactile, proprioception, muscle tone, touch.
5 Multiple Choice Questions
Multiple branches close to cell body allow local cell to cell communication.
- Pain and temperature.
- The Na channels act like booster stations for the propagation of a passively conducted electrical current. This is a more rapid and efficient system.
- -60 mV
In the ventral horn.
5 True/False Questions
Describe repolarization & action potential if a nerve. → Must hit threshold (point at which the cell will become fully depolarized)
Once threshold reached, Na channels open rapidly, the cell becomes positive (depolarized).
Describe the cell body (soma). → Contains the nucleus, located mainly in the CNS.
Describe the hyperpolarization phase (refractory period) →
What is passive propagation responsible for? → Sensory function, cell-to-cell communication & impulse modulation.
Describe A-fibers. → Myelinated, preganglionic autonomic