STANDARDZoology-Respiratory System
STANDARD Zoology Muscles Involved in Breathing MCQ Question
Type: MCQ-conceptual-Medium
During forced expiration, actively contracting muscles include the
A
Diaphragm
B
External intercostals
C
Abdominal muscles
D
Diaphragm and intestinal muscle
Correct Answer
Option C
Detailed Explanation
During forced expiration, diaphragm (phrenic muscles) and external intercostal muscles relax to decrease thoracic cavity while abdominal muscles contract to decrease thoracic cavity, pushing air out.
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