ATI LPN
Medical-Surgical Nursing Neurological System Questions
Question 1 of 5
The Reticular Activation System (RAS) is responsible for:
Correct Answer: A
Rationale: The RAS, part of the reticular formation, maintains wakefulness and sleep cycles. [Level: Knowledge]
Question 2 of 5
How many pairs of spinal nerves are there in the human spinal cord?
Correct Answer: A
Rationale: Humans have 31 pairs of spinal nerves: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal. [Level: Knowledge]
Question 3 of 5
The lumbar plexus is associated with spinal nerves from which vertebral levels?
Correct Answer: A
Rationale: The lumbar plexus forms from L1-L4 spinal nerves. [Level: Knowledge]
Question 4 of 5
Postganglionic neurons of the sympathetic nervous system release the neurotransmitter:
Correct Answer: B
Rationale: Sympathetic postganglionic neurons release norepinephrine (except sweat glands: ACh). [Level: Knowledge]
Question 5 of 5
The neurotransmitter deficiency most commonly associated with Alzheimer's disease is a decrease in:
Correct Answer: C
Rationale: Acetylcholine deficiency in the basal forebrain is linked to Alzheimer’s memory loss. [Level: Knowledge]