ATI RN
Questions About the Nervous System Questions
Question 1 of 5
An IPSP is believed to cause:
Correct Answer: D
Rationale: An inhibitory postsynaptic potential (IPSP) increases permeability to K⁺ (efflux) and Cl⁻ (influx), hyperpolarizing the membrane to inhibit action potentials.
Question 2 of 5
The nurse asks a client to stick out the tongue. The nurse is testing the function of what cranial nerve?
Correct Answer: D
Rationale: CN XII (hypoglossal) controls tongue movement. CN III (oculomotor), VI (abducens), and IX (glossopharyngeal) affect eyes or swallowing/taste, not tongue protrusion.
Question 3 of 5
A client has been prescribed a drug categorized as a sympathomimetic agent, which mimics or imitates sympathetic nervous system activity. What effects would the nurse expect to see in this client based on use of this drug?
Correct Answer: B
Rationale: Sympathomimetics (e.g., norepinephrine mimics) cause pupil dilation (fight-or-flight). BP increases, salivation decreases, pulse quickens.
Question 4 of 5
Which is not a lobe of the cerebrum?
Correct Answer: D
Rationale: The cerebrum has four lobes: frontal, parietal, occipital, and temporal. The insula (insular) is a region within the cortex, not a distinct lobe. 'Sphenoidal' is not a recognized lobe, likely referring to the sphenoid bone, not brain anatomy.
Question 5 of 5
The inability of a patient to perceive pain might be due to a tumor or trauma of the:
Correct Answer: D
Rationale: The thalamus relays sensory signals, including pain, to the cortex. Damage here can impair pain perception. The insula processes taste/emotion, hypothalamus regulates homeostasis, red nucleus aids motor coordination, and pons handles respiration.