alleryStart learning →Which medullary group drives the accessory muscles used in forced breathing?
AThe pneumotaxic centre of the pons
BThe apneustic centre of the pons
CThe dorsal respiratory group
DThe ventral respiratory group
Answer & Solution
Correct answer: D. The ventral respiratory group
1. Forced breathing needs accessory muscles on both inspiration and expiration.
2. The ventral respiratory group stimulates those accessory muscles to contract.
3. It drives both forced inspiration and forced expiration, so the fourth option is correct.
4. The dorsal respiratory group handles the diaphragm and intercostals of ordinary inspiration instead.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 22 "The Respiratory System", section 22.3 The Process of Breathing_
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