1. Tardigrade
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  3. Biology
  4. During forced expiration, actively contracting muscles include the

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Q. During forced expiration, actively contracting muscles include the

Bihar CECEBihar CECE 2011

Solution:

Expiration is a passive process that does not require the involvement of any muscular contraction. In a forced expiration, the abdominal muscles increase infra-abdominal pressure and pull the rib-cage downward and inward.