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nmdcat.online July 7, 2026

18. During sudden exposure to bright light, rapid constriction of the pupil depends mainly upon the functional integrity of the

A. Midbrain
✓
B. Cerebellum
C. Hypothalamus
D. Medulla oblongata

📝 Explanation

The midbrain contains reflex centers responsible for visual reflexes, including pupillary constriction in response to bright light.

📖 Additional Information

  • Midbrain
  • Cerebellum
  • Hypothalamus
  • Medulla oblongata

The midbrain contains reflex centers responsible for visual reflexes, including pupillary constriction in response to bright light.

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