Anatomy & Physiology Chapter 7 (Part 1) Study Guide
1. What is the central nervous system (CNS)? What is the peripheral nervous system (PNS)?
What is the autonomic nervous system (ANS)? What is the motor (efferent) division? What is
the sensory (afferent) division?
2. ___________________ form the myelin sheath in the CNS.
3. ___________________ form the myelin sheath in the PNS around the ______________.
4. What are axons? What are dendrites? How do they differ in the direction they send
information?
5. Collections of nerve cell bodies outside the CNS are called _____________________.
6. What are interneurons? What role do they play in the nervous system?
7. What are multipolar, bipolar, and unipolar neurons? How are they different? Which ones are
rarely found in adults? Which are commonly found in the eye and nose?
8. The two major functional properties of neurons are ___________________ and
__________________.
9. What is white matter and where is it located? What is grey matter and where is it located?
10. Explain in detail the process that a neuron goes through to send a message. What state is a
neuron in during rest? Clearly define and understand the processes of depolarization and
repolarization. What ions play a role in each part (i.e. calcium, sodium, potassium). Explain the
entire process from rest all the way through sending a message across the synaptic cleft.
11. The gap between two communicating neurons is called the _________________________.
12. What is a neurotransmitter?
13. Name the five steps in a typical reflex arc.
14. Label:
Axon, Axon Terminal, Dendrites, Myelin Sheath, Node of Ranvier