Exam 16:The Respiratory System-Part B

The phrenic nerves carry motor impulses to the ________________________.

The limit of respiratory compensation for an ongoing metabolic pH imbalance is approximately _____________ %.

The bones that increase the surface of the nasal mucosa are the _______________________.

During breathing,the pleural membranes are kept together by the presence of ___________________.

In internal respiration,carbon dioxide diffuses from the _________________________ to the ________________________.

In external respiration,the PO? in the alveoli is ________________,and the PO? in the surrounding blood is ________________.

The internal intercostal muscles contribute to a(n)__________________________ by pulling the ribs __________________________.

The inspiration and expiration centers are located in the ____________________ of the brain.

During inhalation,intrapulmonic pressure _____________________,and air moves ________________ the lungs.

The strongest stimulus to increase the breathing rate is a higher level of ____________________ in the blood,because this makes the blood more _____________________.

During swallowing,the nasopharynx is covered by the ___________________________.

Coming from the middle ear cavities,the ___________________________ open into the nasopharynx.

In external respiration,carbon dioxide diffuses from the _______________________ to the _____________________________.

The ribs are pulled up and out by the _____________________________ muscles during ________________________________.

In external respiration,the PCO₂ in the alveoli is ________________,and the PCO₂ in the surrounding blood is ______________ .

The carotid and aortic bodies contain __________________________ that detect decreases in the blood _____________________ level.

Normal inflation of alveoli is possible because _____________________________ decreases the surface tension within alveoli.

A forced exhalation requires the _____________________________ muscles,which pull the ribs ______________________.

The trachea and all of the respiratory passages are collectively called the ________________________.

Mucus and pathogens are swept out of the larynx and trachea by _______________________________.