A client is examined by a nurse who is assessing the client's ability to move the eyes. Which set of cranial nerves will the nurse examine?

Correct Answer: C

Rationale: Eye movement is controlled by CN III (oculomotor), IV (trochlear), and VI (abducens). CN I (olfactory), II (optic), and VII (facial) handle smell, vision, and facial muscles.

Correct Answer: A

Rationale: The frontal lobe handles motor functions and planning, not sensory interpretation (done by the parietal lobe’s somatosensory cortex). Parietal does somatesthetic interpretation, occipital manages vision, and temporal handles memory and audition.

Correct Answer: A

Rationale: The hypothalamus regulates body temperature, thirst (via osmoreceptors), and sleep-wake cycles. The pons and medulla handle respiration, the pituitary gland releases hormones, and the cerebrum manages higher functions.

Correct Answer: D

Rationale: All statements are correct: the medulla has decussating fibers (e.g., pyramids), is part of the reticular formation, contains cranial nerve nuclei (e.g., IX, X), and regulates heart rate, blood pressure, and breathing.

Correct Answer: B

Rationale: The blood-brain barrier (BBB), formed by tight junctions in capillaries, restricts ions like Na⁺ to protect the brain. Lipid-soluble compounds and water pass more easily, while lipids are not specifically restricted.