What is ventilation
A. An increase in the hydrogen ion concentration in the interstitial spaces of the brain stem leads to an increase in the duration of the respiratory cycle (duration of respiratory cycle equals duration of inspiration plus duration of expiration).
B. An increase in the pressure within the chest cavity results in the inspiration of air into the lungs.
C. The problems with ventilation induced by injection of curare occur because of the drug's direct action on the mAChRs (muscarinic Acetylcholine Receptors) in the plasma membranes of the diaphragm skeletal muscle and the rib-cage skeletal muscles.