Match the following 10 items to the appropriate definition or description.

Which of the following is responsible for normal everyday breathing

Peripheral chemoreceptors no longer respond when the PaO2 falls below  ______________. 

The phrenic nerve arises from what area of the spinal column

Increased blood pressure sensed by baroreceptors in the carotids and aortic archlead to which of the following changes in breathing?

Normal PACO2 is _________.

When the V/Q ratio increases, the: PACO2increases PAO2increases PACO2decreases PAO2decreases PAO2and PACO2remain the same

RER (Respiratory Exchange Ratio) reflects gas exchange between the pulmonary capillaries and the alveoli.

You would be able to effectively breathe if you were born with anacephaly (without a brain). 

In the normal upright lung, the V/Q decreases in the bases because