Valsalva's maneuver involves closing off the glottis (preventing expiration) while contracting the muscles of expiration, causing an increase in intra- abdominal pressure.

Name: Valsalva's maneuver involves closing off the glottis (preventing expiration) while contracting the muscles of expiration, causing an increase in intra- abdominal pressure.
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Valsalva's maneuver involves closing the glottis and contracting expiratory muscles, which increases intra-abdominal and intrathoracic pressure.

Valsalva's Maneuver Involves Closing Off the Glottis (Preventing Expiration) While