Certified Rehabilitation Registered Nurse (CRRN) Practice Exam

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Prepare for the CRRN Exam with practice quizzes that include flashcards, hints, and explanations. Ensure success by testing your rehabilitation nursing knowledge with confidence-building tools and resources.

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What body system is primarily affected by ALS?

Nervous system
Skeletal muscles
Cardiovascular system
Immune system

The correct answer is: Skeletal muscles

The body system primarily affected by ALS, or Amyotrophic Lateral Sclerosis, is the nervous system. This progressive neurodegenerative disease specifically attacks motor neurons in the brain and spinal cord, which are responsible for controlling voluntary muscles. As a result, individuals with ALS experience muscle weakness, atrophy, and ultimately loss of voluntary muscle control as the disease advances. While skeletal muscles are impacted because they are controlled by the motor neurons, the underlying issue lies within the nervous system itself, marking it as the primary system affected. The skeletal muscles are functioning normally until the motor neurons they depend on deteriorate. The cardiovascular system and immune system do not have a direct primary involvement in the pathology of ALS, which highlights the significance of the nervous system's role in this condition.