An Individual with the Condition of Myasthenia Gravis Is Faced

question 10

Multiple Choice

An individual with the condition of myasthenia gravis is faced with an autoimmune disorder in which the body defenses attack acetylcholine receptors on muscle cells. What would be the expected effect on calcium levels near contractile proteins, following the arrival of an electrical impulse at those neuromuscular junctions?

• A) a rapid decrease in concentration due to uptake by sarcoplasmic reticulum
• B) a rapid increase in concentration due to release by sarcoplasmic reticulum
• C) small or no increases in concentration due to weak responses by acetylcholine receptors
• D) a large decrease in concentration that occurs slowly
• E) a large increase in concentration that occurs slowly

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Definitions:

Maintenance Phase

A stage in relationship development where efforts are focused on preserving and sustaining the relationship.

Fatalistic

Believing that all events are predetermined and inevitably caused by external forces, leading to a sense of powerlessness over one's future or outcomes.

External Attributional Style

A tendency to attribute one's own behaviors and outcomes to external factors or forces beyond one's personal control.

Emotional Lability

A condition of emotional instability characterized by rapid and extreme mood changes.