Brain waves common to a healthy, sleeping person and a brain-damaged, awake person are called:

Correct Answer: B

Rationale: Delta waves (slow, high-amplitude) occur in deep sleep in healthy individuals and can appear in awake brain-damaged patients, indicating dysfunction. Alpha (relaxed), beta (alert), and theta (light sleep) have different contexts.

Correct Answer: C

Rationale: Theta waves (4-8 Hz) in adults while awake often indicate brain dysfunction or damage, common in pathological states. They occur normally in children or during light sleep/dreaming, but not typically in healthy awake adults.

Correct Answer: C

Rationale: Astrocytes form part of the blood-brain barrier, with their end-feet surrounding capillaries, regulating substance passage. Schwann cells are in the PNS, microglia are immune cells, and neurolemma is PNS-specific.

Correct Answer: D

Rationale: The superior colliculi (in the midbrain) process visual reflexes (e.g., eye movements). Trauma here affects vision, not speech (frontal lobe), audition (inferior colliculi), coordination (cerebellum), or pain (thalamus).