What effect does the lack of pneumotaxic and stretch receptor neurons have on ventilation?

Answer and explanation :

there are many problem due to lack of pneumotaxic and stetch receptor neurons on ventilation

DUE TO LACK OF PNEUMOTAXIC  CENTER :

pneumotaxic center is present in the nucleus which is used to transmit impulse to the inspiratory area which is not possible due to lack of pneumotaxic centerit controls the duration of filling of lungs it also control the medullary respiratory system which is not possible due to lack of this

DUE TO LACK OF STRETCH RECEPTOR :

The hearing breuer inflation reflex is generated by stretch receptor neuron which is not generated due to lack of stretch receptorwhen stretched these receptors send the inhibitory impulses through the vegus nerve to the DMG neuron which is not possible due to lack of this  

The correct answer to what you are asking is probably a for a plethora of reasons