ATI RN
Test Questions on Autonomic Nervous System Questions
Question 1 of 5
Which of the following reflexes is polysynaptic:
Correct Answer: C
Rationale: The knee jerk (A), ankle jerk (B), and supinator reflex (D) are monosynaptic stretch reflexes. The abdominal reflex (C) is polysynaptic, involving interneurons and cutaneous input. C is correct.
Question 2 of 5
A 70 year old man suddenly developed loss of consciousness and right sided upper and lower limb weakness. On clinical examination, the following is true:
Correct Answer: D
Rationale: This suggests a left hemispheric stroke (e.g., MCA), causing right-sided weakness and upper motor neuron signs: absent abdominal reflexes (D, correct), exaggerated reflexes on the right (not both, B), and possible left sensory loss (not both, C). Power isn’t lost bilaterally (A). D fits best.
Question 3 of 5
Which lobe of the cerebral cortex is responsible for generating motor commands?
Correct Answer: D
Rationale: The frontal lobe (D) contains the primary motor cortex (Brodmann area 4), responsible for voluntary motor commands. The temporal (A) processes auditory and memory, parietal (B) sensory integration, and occipital (C) vision. D is correct.
Question 4 of 5
What type of glial cell is responsible for filtering blood to produce CSF at the choroid plexus?
Correct Answer: A
Rationale: Ependymal cells (A) in the choroid plexus filter blood to produce cerebrospinal fluid (CSF). Astrocytes (B) support neurons, oligodendrocytes (C) myelinate CNS axons, and Schwann cells (D) myelinate PNS axons. A is correct.
Question 5 of 5
Which of the following cavities contains a component of the central nervous system?
Correct Answer: C
Rationale: The central nervous system (CNS) consists of the brain and spinal cord. The cranial cavity houses the brain, making it the correct choice. The abdominal cavity contains digestive organs, the pelvic cavity contains reproductive and urinary organs, and the thoracic cavity contains the heart and lungs—none of which include CNS components.