Demyelination of an Axon

question 4

Multiple Choice

Demyelination of an axon:

• A)Results in decreased membrane resistance,allowing a leakage of electrical current.
• B)Results in slowed propagation of action potentials.
• C)May prevent propagation of action potentials.
• D)Both A and B
• E)A,B,and C

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Definitions:

Gametophyte

The haploid stage in the life cycle of plants and algae that produces gametes through mitosis for sexual reproduction.

Megasporangium

In a heterosporous plant, structure in which megaspores are produced. Megasporangia of seed plants are ovules that develop into seeds following fertilization. Compare with microsporangium.

Heterosporous

Referring to plants that produce two types of spores, microspores which develop into male gametophytes and megaspores which develop into female gametophytes.

Vascular Tissues

Specialized structures in plants that conduct water, nutrients, and sugars throughout the organism.