Demyelinating Diseases Such as Multiple Sclerosis Disrupt Normal Neural Communication

question 34

Multiple Choice

Demyelinating diseases such as multiple sclerosis disrupt normal neural communication by

• A)destroying receptors on postsynaptic cells so that neurotransmitters cannot bind normally.
• B)creating lesions in the blood-brain barrier that allow toxic substances to enter the brain from the bloodstream.
• C)causing deterioration of the fatty substance that normally coats and insulates axons.
• D)diminishing the activity of the sodium-potassium pumps that usually maintain the resting potential of neurons.

---

Definitions:

Reactivity

The propensity of a substance to undergo a chemical reaction with itself or another material.

Self-regulation

The process by which individuals control their behavior in accordance with internal goals or standards.

Temperament

The inherent aspects of an individual's personality, such as moodiness, activity level, and emotional reactivity, often observable from infancy.

Affect

The experience of feeling or emotion that is often a response to stimuli in the environment.