Download click - Uplift Education

Chapter 12 Nervous Tissue
Name:____________________ Class: ____
Introduction to the Nervous System
1) What are the three functions of the nervous system?
2) Differentiate between the CNS and the PNS.
3) Differentiate between somatic and autonomic.
Neurons
4) What are the 5 special characteristics of neurons?
5) Draw a neuron, labeling each of the following and describing their functions.
Dendrite, cell body, axon, neurolemmocyte (Schwann cell), neurofibril node (Node of Ranvier),
telodendria (axon terminals)
6) Differentiate between afferent, efferent, and interneurons.
Glial Cells
7) Describe the function(s) of each of the following CNS neuroglia:
 Astrocytes

Ependymal cells

Microglia

Oligodendrocytes
8) Which CNS glial cell is most abundant?
9) What is a glioma?
10) Describe the function(s) of each of the following PNS neuroglia:

Satellite cells

Neurolemmocytes (Schawnn cells)
11) What is the function of the myelin sheath?
12) What is the cause of MS?
Plasma Membrane of Neurons
13) Differentiate between leak channels, chemically gated channels, and voltage-gated channels.
Introduction to Neuron Physiology
14) Define and give the typical value for the resting membrane potential.
15) When a neuron is at resting membrane potential, which ions are more concentrated in the interstitial
fluid (outside the cell)?
When a neuron is a resting membrane potential, which ions are more concentrated in the cytosol
(inside the cell)?
What processes position the ions in these locations?
16) Draw an action potential. Label the following events and describe the flow of ions during each event:
resting membrane potential, graded potentials, depolarization, repolarization, hyperpolarization.
17) How does lidocaine work?
18) What is a refractory period?
19) Differentiate between continuous conduction and saltatory conduction. Where does each occur?
Which is faster and why?
20) What is a neurotransmitter and when/why are they released?
21) What are the four steps to the release of a neurotransmitter?
22) What is a neurotoxin and what are three ways in which a neurotoxin might function?
23) What are endocannabinoids and what do they do?