In Multiple Sclerosis, the Myelin Sheaths Around the Axons of the Brain

question 23

Multiple Choice

In multiple sclerosis, the myelin sheaths around the axons of the brain and spinal cord are damaged and demyelination results. How does multiple sclerosis manifest at the level of the action potential?

• A) Action potentials move in the opposite direction on the axon.
• B) Action potentials move more slowly along the axon.
• C) No action potentials are transmitted.
• D) Action potentials grow stronger as they move down an axon.

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Definitions:

Self-schema

The cognitive structures derived from past experience that represents a person's beliefs and feelings about themselves in specific domains.

Declarative Self

A component of the self-concept consisting of all the facts and individual beliefs about oneself, including personal history and self-knowledge.

Rehearsal

Rehearsal is a cognitive process involving the review or practice of information or skills, aimed at enhancing memory or performance.

Elongation

Elongation refers to the process of becoming longer or the state of being lengthened, often used in physics, biology, or material science contexts.