Answer: True.
Explanation:
The Valsalva maneuver is performed by forcibly exhaling against a closed airway. Maneuver variations can be used either in medicine, as a test of cardiac function and autonomic nervous control of the heart. A modified version is done by expiring against a closed glottis. This will bring forth the cardiovascular responses but will not force air into the eustachian tubes.
Answer:
false thats dangourous
Explanation:
they would die trying to reach them
False.
There are risks. Sometimes, the body won't accept such medications.