* not completed

. The respiratory nerves modulate the intrinsic rhythmical activity of the diaphragm.

True correct incorrect

False correct incorrect

* not completed

. The basic neural machinery for the generation of the respiratory rhythm is located in the brainstem.

True correct incorrect

False correct incorrect

* not completed

. Respiration will stop if all afferent nerves to the lungs are cut.

True correct incorrect

False correct incorrect

* not completed

. The internal intercostal muscles are most active during inspiration.

True correct incorrect

False correct incorrect

* not completed

. Under normal circumstances the partial pressure of carbon dioxide is more important in the regulation of breathing than the partial pressure of oxygen.

True correct incorrect

False correct incorrect

* not completed

. Concerning the chemical regulation of respiration:

The depth and rate of ventilation is decreased when a subject breathes air containing pure oxygen at normal atmospheric pressure. correct incorrect

The central chemoreceptors sense the oxygen tension of the arterial blood correct incorrect

In man, the peripheral chemoreceptors are located in the carotid sinus and aortic arch correct incorrect

The peripheral chemoreceptors are the only receptors able to respond to changes in the partial pressure of oxygen in the arterial blood. correct incorrect