What Part Do the Sternocleidomastoid and Scalenus Play in Exercise

question 89

Multiple Choice

What part do the sternocleidomastoid and scalenus play in exercise?

• A)They assist the diaphragm in expelling air forcefully
• B)They pull the diaphragm up towards the rib cage at the end of expiration
• C)They act as accessories to the diaphragm to help expand the rib cage
• D)They are the primary muscles used in power breathing

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